99970392 has 32 divisors (see below), whose sum is σ = 253094400. Its totient is φ = 32901024.

The previous prime is 99970391. The next prime is 99970393. The reversal of 99970392 is 29307999.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (99970391) and next prime (99970393).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99970391) 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, 24468 + ... + 28259.

It is an arithmetic number, because the mean of its divisors is an integer number (7909200).

Almost surely, 2^99970392 is an apocalyptic number.

It is an amenable number.

99970392 is an abundant number, since it is smaller than the sum of its proper divisors (153124008).

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

99970392 is a wasteful number, since it uses less digits than its factorization.

99970392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52815 (or 52811 counting only the distinct ones).

The product of its (nonzero) digits is 275562, while the sum is 48.

The square root of 99970392 is about 9998.5194904046. The cubic root of 99970392 is about 464.1130694521.

The spelling of 99970392 in words is "ninety-nine million, nine hundred seventy thousand, three hundred ninety-two".