99859977 has 24 divisors (see below), whose sum is σ = 165484800. Its totient is φ = 56842560.

The previous prime is 99859961. The next prime is 99859979. The reversal of 99859977 is 77995899.

It is not a de Polignac number, because 99859977 - 2⁴ = 99859961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (99859979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14149 + ... + 19997.

It is an arithmetic number, because the mean of its divisors is an integer number (6895200).

Almost surely, 2^99859977 is an apocalyptic number.

It is an amenable number.

99859977 is a deficient number, since it is larger than the sum of its proper divisors (65624823).

99859977 is a wasteful number, since it uses less digits than its factorization.

99859977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6133 (or 6130 counting only the distinct ones).

The product of its digits is 12859560, while the sum is 63.

The square root of 99859977 is about 9992.9963974776. The cubic root of 99859977 is about 463.9421391014.

The spelling of 99859977 in words is "ninety-nine million, eight hundred fifty-nine thousand, nine hundred seventy-seven".