77977922 has 16 divisors (see below), whose sum is σ = 128094912. Its totient is φ = 35307120.

The previous prime is 77977909. The next prime is 77977937. The reversal of 77977922 is 22977977.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 953 + ... + 12524.

It is an arithmetic number, because the mean of its divisors is an integer number (8005932).

Almost surely, 2^77977922 is an apocalyptic number.

77977922 is a deficient number, since it is larger than the sum of its proper divisors (50116990).

77977922 is a wasteful number, since it uses less digits than its factorization.

77977922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13753.

The product of its digits is 777924, while the sum is 50.

The square root of 77977922 is about 8830.5108572494. The cubic root of 77977922 is about 427.2255516484.

Subtracting from 77977922 its reverse (22977977), we obtain a palindrome (54999945).

The spelling of 77977922 in words is "seventy-seven million, nine hundred seventy-seven thousand, nine hundred twenty-two".