99457690 has 16 divisors (see below), whose sum is σ = 180016200. Its totient is φ = 39562560.

The previous prime is 99457679. The next prime is 99457691. The reversal of 99457690 is 9675499.

It can be written as a sum of positive squares in 4 ways, for example, as 38477209 + 60980481 = 6203^2 + 7809^2 .

It is a super-2 number, since 2×99457690² = 19783664200272200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99457691) 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, 25665 + ... + 29284.

Almost surely, 2^99457690 is an apocalyptic number.

99457690 is a deficient number, since it is larger than the sum of its proper divisors (80558510).

99457690 is a wasteful number, since it uses less digits than its factorization.

99457690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55137.

The product of its (nonzero) digits is 612360, while the sum is 49.

The square root of 99457690 is about 9972.8476374604. The cubic root of 99457690 is about 463.3183019927.

The spelling of 99457690 in words is "ninety-nine million, four hundred fifty-seven thousand, six hundred ninety".