99646257 has 16 divisors (see below), whose sum is σ = 135051840. Its totient is φ = 65344512.

The previous prime is 99646243. The next prime is 99646271. The reversal of 99646257 is 75264699.

It is an interprime number because it is at equal distance from previous prime (99646243) and next prime (99646271).

It is not a de Polignac number, because 99646257 - 2⁶ = 99646193 is a prime.

It is a super-2 number, since 2×99646257² = 19858753068220098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99646207) 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, 51133 + ... + 53045.

It is an arithmetic number, because the mean of its divisors is an integer number (8440740).

Almost surely, 2^99646257 is an apocalyptic number.

99646257 is a gapful number since it is divisible by the number (97) formed by its first and last digit.

It is an amenable number.

99646257 is a deficient number, since it is larger than the sum of its proper divisors (35405583).

99646257 is a wasteful number, since it uses less digits than its factorization.

99646257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2192.

The product of its digits is 816480, while the sum is 48.

The square root of 99646257 is about 9982.2971805091. The cubic root of 99646257 is about 463.6109268803.

The spelling of 99646257 in words is "ninety-nine million, six hundred forty-six thousand, two hundred fifty-seven".