99999572 has 12 divisors (see below), whose sum is σ = 177965760. Its totient is φ = 49152216.

The previous prime is 99999563. The next prime is 99999587. The reversal of 99999572 is 27599999.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211628 + ... + 212099.

It is an arithmetic number, because the mean of its divisors is an integer number (14830480).

Almost surely, 2^99999572 is an apocalyptic number.

It is an amenable number.

99999572 is a deficient number, since it is larger than the sum of its proper divisors (77966188).

99999572 is a wasteful number, since it uses less digits than its factorization.

99999572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423790 (or 423788 counting only the distinct ones).

The product of its digits is 4133430, while the sum is 59.

The square root of 99999572 is about 9999.9785999771. The cubic root of 99999572 is about 464.1582211603.

The spelling of 99999572 in words is "ninety-nine million, nine hundred ninety-nine thousand, five hundred seventy-two".