99775870 has 16 divisors (see below), whose sum is σ = 182541888. Its totient is φ = 39255840.

The previous prime is 99775861. The next prime is 99775883. The reversal of 99775870 is 7857799.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81174 + ... + 82393.

It is an arithmetic number, because the mean of its divisors is an integer number (11408868).

Almost surely, 2^99775870 is an apocalyptic number.

99775870 is a deficient number, since it is larger than the sum of its proper divisors (82766018).

99775870 is a wasteful number, since it uses less digits than its factorization.

99775870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163635.

The product of its (nonzero) digits is 1111320, while the sum is 52.

The square root of 99775870 is about 9988.7872136711. The cubic root of 99775870 is about 463.8118508623.

It can be divided in two parts, 997 and 75870, that added together give a palindrome (76867).

The spelling of 99775870 in words is "ninety-nine million, seven hundred seventy-five thousand, eight hundred seventy".