99977986 has 16 divisors (see below), whose sum is σ = 158976000. Its totient is φ = 46992960.

The previous prime is 99977923. The next prime is 99977989. The reversal of 99977986 is 68977999.

It is not an unprimeable number, because it can be changed into a prime (99977989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49015 + ... + 51013.

It is an arithmetic number, because the mean of its divisors is an integer number (9936000).

Almost surely, 2^99977986 is an apocalyptic number.

99977986 is a deficient number, since it is larger than the sum of its proper divisors (58998014).

99977986 is a wasteful number, since it uses less digits than its factorization.

99977986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3489.

The product of its digits is 15431472, while the sum is 64.

The square root of 99977986 is about 9998.8992394163. The cubic root of 99977986 is about 464.1248208828.

The spelling of 99977986 in words is "ninety-nine million, nine hundred seventy-seven thousand, nine hundred eighty-six".