865992057 has 16 divisors (see below), whose sum is σ = 1320053760. Its totient is φ = 494685072.

The previous prime is 865991999. The next prime is 865992073. The reversal of 865992057 is 750299568.

It is a happy number.

It is not a de Polignac number, because 865992057 - 2¹² = 865987961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (865992077) 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, 84244 + ... + 93962.

It is an arithmetic number, because the mean of its divisors is an integer number (82503360).

Almost surely, 2^865992057 is an apocalyptic number.

It is an amenable number.

865992057 is a deficient number, since it is larger than the sum of its proper divisors (454061703).

865992057 is a wasteful number, since it uses less digits than its factorization.

865992057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13972.

The product of its (nonzero) digits is 1360800, while the sum is 51.

The square root of 865992057 is about 29427.7429817511. The cubic root of 865992057 is about 953.1720585448.

The spelling of 865992057 in words is "eight hundred sixty-five million, nine hundred ninety-two thousand, fifty-seven".