99724375 has 20 divisors (see below), whose sum is σ = 125241160. Its totient is φ = 79380000.

The previous prime is 99724333. The next prime is 99724381. The reversal of 99724375 is 57342799.

It is not a de Polignac number, because 99724375 - 2⁹ = 99723863 is a prime.

It is a super-4 number, since 4×99724375⁴ (a number of 33 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 236665 + ... + 237085.

It is an arithmetic number, because the mean of its divisors is an integer number (6262058).

Almost surely, 2^99724375 is an apocalyptic number.

99724375 is a deficient number, since it is larger than the sum of its proper divisors (25516785).

99724375 is an equidigital number, since it uses as much as digits as its factorization.

99724375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820 (or 805 counting only the distinct ones).

The product of its digits is 476280, while the sum is 46.

The square root of 99724375 is about 9986.2092407480. The cubic root of 99724375 is about 463.7320449889.

The spelling of 99724375 in words is "ninety-nine million, seven hundred twenty-four thousand, three hundred seventy-five".