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BaseRepresentation
bin111011011000000…
…0100100110101101
312010211220000000001
41312300010212231
513040013011021
6525410104301
7100241245321
oct16660044655
95124800001
101992313261
11932677494
1247727b091
132599b56b3
1414c857981
15b9d95091

1992313261 has 8 divisors (see below), whose sum is σ = 2004393600. Its totient is φ = 1980268080.

The previous prime is 1992313243. The next prime is 1992313277. The reversal of 1992313261 is 1623132991.

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 1992313261 - 27 = 1992313133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1992313261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1992313231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109656 + ... + 126526.

It is an arithmetic number, because the mean of its divisors is an integer number (250549200).

Almost surely, 21992313261 is an apocalyptic number.

It is an amenable number.

1992313261 is a deficient number, since it is larger than the sum of its proper divisors (12080339).

1992313261 is a wasteful number, since it uses less digits than its factorization.

1992313261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17579.

The product of its digits is 17496, while the sum is 37.

The square root of 1992313261 is about 44635.3364611493. The cubic root of 1992313261 is about 1258.3048635441.

The spelling of 1992313261 in words is "one billion, nine hundred ninety-two million, three hundred thirteen thousand, two hundred sixty-one".