99977512 has 16 divisors (see below), whose sum is σ = 189391860. Its totient is φ = 49473024.

The previous prime is 99977509. The next prime is 99977513. The reversal of 99977512 is 21577999.

It can be written as a sum of positive squares in 2 ways, for example, as 86974276 + 13003236 = 9326^2 + 3606^2 .

It is not an unprimeable number, because it can be changed into a prime (99977513) 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 3 ways as a sum of consecutive naturals, for example, 63643 + ... + 65194.

Almost surely, 2^99977512 is an apocalyptic number.

It is an amenable number.

99977512 is a deficient number, since it is larger than the sum of its proper divisors (89414348).

99977512 is a wasteful number, since it uses less digits than its factorization.

99977512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128940 (or 128936 counting only the distinct ones).

The product of its digits is 357210, while the sum is 49.

The square root of 99977512 is about 9998.8755367791. The cubic root of 99977512 is about 464.1240874029.

It can be divided in two parts, 99977 and 512, that added together give a square (100489 = 317²).

The spelling of 99977512 in words is "ninety-nine million, nine hundred seventy-seven thousand, five hundred twelve".