99239257 has 8 divisors (see below), whose sum is σ = 106950536. Its totient is φ = 91539072.

The previous prime is 99239233. The next prime is 99239269. The reversal of 99239257 is 75293299.

It can be written as a sum of positive squares in 4 ways, for example, as 59536656 + 39702601 = 7716^2 + 6301^2 .

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 99239257 - 2¹⁹ = 98714969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99239057) 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, 32563 + ... + 35479.

It is an arithmetic number, because the mean of its divisors is an integer number (13368817).

Almost surely, 2^99239257 is an apocalyptic number.

99239257 is the 5752-nd hex number.

It is an amenable number.

99239257 is a deficient number, since it is larger than the sum of its proper divisors (7711279).

99239257 is a wasteful number, since it uses less digits than its factorization.

99239257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5547.

The product of its digits is 306180, while the sum is 46.

The square root of 99239257 is about 9961.8902322802. The cubic root of 99239257 is about 462.9788672487.

The spelling of 99239257 in words is "ninety-nine million, two hundred thirty-nine thousand, two hundred fifty-seven".