99870924 has 24 divisors (see below), whose sum is σ = 233433088. Its totient is φ = 33233040.

The previous prime is 99870919. The next prime is 99870929. The reversal of 99870924 is 42907899.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (99870919) and next prime (99870929).

It is a super-2 number, since 2×99870924² = 19948402921227552, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99870929) 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, 429 + ... + 14139.

Almost surely, 2^99870924 is an apocalyptic number.

It is an amenable number.

99870924 is an abundant number, since it is smaller than the sum of its proper divisors (133562164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99870924 is a wasteful number, since it uses less digits than its factorization.

99870924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14325 (or 14323 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 99870924 is about 9993.5441160781. The cubic root of 99870924 is about 463.9590914687.

The spelling of 99870924 in words is "ninety-nine million, eight hundred seventy thousand, nine hundred twenty-four".