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986392021 = 61132112241
BaseRepresentation
bin111010110010110…
…010010111010101
32112202001220110211
4322302302113111
54010004021041
6241513445421
733305123326
oct7262622725
92482056424
10986392021
11466879a1a
12236410871
13129484324
149500844d
155b8e4481
hex3acb25d5

986392021 has 8 divisors (see below), whose sum is σ = 1003403288. Its totient is φ = 969408000.

The previous prime is 986392009. The next prime is 986392079. The reversal of 986392021 is 120293689.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 46049796 + 940342225 = 6786^2 + 30665^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 986392021 - 29 = 986391509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (986392091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74461 + ... + 86701.

It is an arithmetic number, because the mean of its divisors is an integer number (125425411).

It is a Poulet number, since it divides 2986392020-1.

Almost surely, 2986392021 is an apocalyptic number.

It is an amenable number.

986392021 is a deficient number, since it is larger than the sum of its proper divisors (17011267).

986392021 is a wasteful number, since it uses less digits than its factorization.

986392021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13623.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 986392021 is about 31406.8785618692. The cubic root of 986392021 is about 995.4432747936.

The spelling of 986392021 in words is "nine hundred eighty-six million, three hundred ninety-two thousand, twenty-one".

Divisors: 1 61 1321 12241 80581 746701 16170361 986392021