99908739 has 24 divisors (see below), whose sum is σ = 166639200. Its totient is φ = 56498688.

The previous prime is 99908723. The next prime is 99908761. The reversal of 99908739 is 93780999.

It is a happy number.

It is not a de Polignac number, because 99908739 - 2⁴ = 99908723 is a prime.

It is a super-2 number, since 2×99908739² = 19963512257140242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99908239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2064 + ... + 14285.

It is an arithmetic number, because the mean of its divisors is an integer number (6943300).

Almost surely, 2^99908739 is an apocalyptic number.

99908739 is a deficient number, since it is larger than the sum of its proper divisors (66730461).

99908739 is a wasteful number, since it uses less digits than its factorization.

99908739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16459 (or 16456 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The square root of 99908739 is about 9995.4359084534. The cubic root of 99908739 is about 464.0176417069.

The spelling of 99908739 in words is "ninety-nine million, nine hundred eight thousand, seven hundred thirty-nine".