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87949841 = 7191993323
BaseRepresentation
bin1010011111000…
…00001000010001
320010111022111112
411033200020101
5140003343331
612421023105
72115363350
oct517401021
9203438445
1087949841
1145711021
1225554a95
13152b4a35
14b975997
157ac432b
hex53e0211

87949841 has 16 divisors (see below), whose sum is σ = 106368000. Its totient is φ = 71037648.

The previous prime is 87949801. The next prime is 87949859. The reversal of 87949841 is 14894978.

It is a cyclic number.

It is not a de Polignac number, because 87949841 - 214 = 87933457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 87949841.

It is not an unprimeable number, because it can be changed into a prime (87949801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24806 + ... + 28128.

It is an arithmetic number, because the mean of its divisors is an integer number (6648000).

Almost surely, 287949841 is an apocalyptic number.

It is an amenable number.

87949841 is a deficient number, since it is larger than the sum of its proper divisors (18418159).

87949841 is a wasteful number, since it uses less digits than its factorization.

87949841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3548.

The product of its digits is 580608, while the sum is 50.

The square root of 87949841 is about 9378.1576548915. The cubic root of 87949841 is about 444.7114924937.

The spelling of 87949841 in words is "eighty-seven million, nine hundred forty-nine thousand, eight hundred forty-one".

Divisors: 1 7 19 133 199 1393 3323 3781 23261 26467 63137 441959 661277 4628939 12564263 87949841