77933977 has 4 divisors (see below), whose sum is σ = 85018896. Its totient is φ = 70849060.

The previous prime is 77933963. The next prime is 77933981.

It is a happy number.

77933977 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77933977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77933927) 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, 3542443 + ... + 3542464.

It is an arithmetic number, because the mean of its divisors is an integer number (21254724).

Almost surely, 2^77933977 is an apocalyptic number.

It is an amenable number.

77933977 is a deficient number, since it is larger than the sum of its proper divisors (7084919).

77933977 is a wasteful number, since it uses less digits than its factorization.

77933977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7084918.

The product of its digits is 1750329, while the sum is 52.

The square root of 77933977 is about 8828.0222586942. The cubic root of 77933977 is about 427.1452812577.

The spelling of 77933977 in words is "seventy-seven million, nine hundred thirty-three thousand, nine hundred seventy-seven".