78910977 has 16 divisors (see below), whose sum is σ = 107991488. Its totient is φ = 51226560.

The previous prime is 78910927. The next prime is 78910981. The reversal of 78910977 is 77901987.

It is not a de Polignac number, because 78910977 - 2⁶ = 78910913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78910927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53583 + ... + 55035.

It is an arithmetic number, because the mean of its divisors is an integer number (6749468).

Almost surely, 2^78910977 is an apocalyptic number.

It is an amenable number.

78910977 is a deficient number, since it is larger than the sum of its proper divisors (29080511).

78910977 is a wasteful number, since it uses less digits than its factorization.

78910977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920.

The product of its (nonzero) digits is 222264, while the sum is 48.

The square root of 78910977 is about 8883.1850706827. The cubic root of 78910977 is about 428.9228076564.

The spelling of 78910977 in words is "seventy-eight million, nine hundred ten thousand, nine hundred seventy-seven".