99274639 has 18 divisors (see below), whose sum is σ = 107929680. Its totient is φ = 91285272.

The previous prime is 99274613. The next prime is 99274649. The reversal of 99274639 is 93647299.

It is not a de Polignac number, because 99274639 - 2⁵ = 99274607 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99274592 and 99274601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99274649) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1256602 + ... + 1256680.

Almost surely, 2^99274639 is an apocalyptic number.

99274639 is a deficient number, since it is larger than the sum of its proper divisors (8655041).

99274639 is an equidigital number, since it uses as much as digits as its factorization.

99274639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 157 counting only the distinct ones).

The product of its digits is 734832, while the sum is 49.

The square root of 99274639 is about 9963.6659418108. The cubic root of 99274639 is about 463.0338830168.

The spelling of 99274639 in words is "ninety-nine million, two hundred seventy-four thousand, six hundred thirty-nine".