99636257 has 12 divisors (see below), whose sum is σ = 119901780. Its totient is φ = 82456416.

The previous prime is 99636239. The next prime is 99636283. The reversal of 99636257 is 75263699.

It can be written as a sum of positive squares in 2 ways, for example, as 45819361 + 53816896 = 6769^2 + 7336^2 .

It is not a de Polignac number, because 99636257 - 2¹⁶ = 99570721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99639257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33638 + ... + 36479.

It is an arithmetic number, because the mean of its divisors is an integer number (9991815).

Almost surely, 2^99636257 is an apocalyptic number.

It is an amenable number.

99636257 is a deficient number, since it is larger than the sum of its proper divisors (20265523).

99636257 is a wasteful number, since it uses less digits than its factorization.

99636257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70160 (or 70153 counting only the distinct ones).

The product of its digits is 612360, while the sum is 47.

The square root of 99636257 is about 9981.7962812311. The cubic root of 99636257 is about 463.5954178035.

The spelling of 99636257 in words is "ninety-nine million, six hundred thirty-six thousand, two hundred fifty-seven".