77899012 has 12 divisors (see below), whose sum is σ = 143498320. Its totient is φ = 36899496.

The previous prime is 77899007. The next prime is 77899021. The reversal of 77899012 is 21099877.

It is a happy number.

It is a super-2 number, since 2×77899012² = 12136512141152288, which contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 77899012.

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, 512418 + ... + 512569.

Almost surely, 2^77899012 is an apocalyptic number.

It is an amenable number.

77899012 is a deficient number, since it is larger than the sum of its proper divisors (65599308).

77899012 is a wasteful number, since it uses less digits than its factorization.

77899012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025010 (or 1025008 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 77899012 is about 8826.0416948936. The cubic root of 77899012 is about 427.0813922693.

The spelling of 77899012 in words is "seventy-seven million, eight hundred ninety-nine thousand, twelve".