77976009 has 12 divisors (see below), whose sum is σ = 112709376. Its totient is φ = 51948312.

The previous prime is 77976001. The next prime is 77976011. The reversal of 77976009 is 90067977.

It is not a de Polignac number, because 77976009 - 2³ = 77976001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77976001) 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 11 ways as a sum of consecutive naturals, for example, 21184 + ... + 24590.

It is an arithmetic number, because the mean of its divisors is an integer number (9392448).

Almost surely, 2^77976009 is an apocalyptic number.

It is an amenable number.

77976009 is a deficient number, since it is larger than the sum of its proper divisors (34733367).

77976009 is a wasteful number, since it uses less digits than its factorization.

77976009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5956 (or 5953 counting only the distinct ones).

The product of its (nonzero) digits is 166698, while the sum is 45.

The square root of 77976009 is about 8830.4025389560. The cubic root of 77976009 is about 427.2220579708. Note that the first 3 decimals are identical.

The spelling of 77976009 in words is "seventy-seven million, nine hundred seventy-six thousand, nine".