76813977 has 16 divisors (see below), whose sum is σ = 104568192. Its totient is φ = 50144640.

The previous prime is 76813969. The next prime is 76813987. The reversal of 76813977 is 77931867.

It is a happy number.

It is not a de Polignac number, because 76813977 - 2³ = 76813969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (76813937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32293 + ... + 34589.

It is an arithmetic number, because the mean of its divisors is an integer number (6535512).

Almost surely, 2^76813977 is an apocalyptic number.

It is an amenable number.

76813977 is a deficient number, since it is larger than the sum of its proper divisors (27754215).

76813977 is a wasteful number, since it uses less digits than its factorization.

76813977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2528.

The product of its digits is 444528, while the sum is 48.

The square root of 76813977 is about 8764.3583336146. The cubic root of 76813977 is about 425.0892121833.

The spelling of 76813977 in words is "seventy-six million, eight hundred thirteen thousand, nine hundred seventy-seven".