77421933 has 16 divisors (see below), whose sum is σ = 119687040. Its totient is φ = 49370112.

The previous prime is 77421919. The next prime is 77421943. The reversal of 77421933 is 33912477.

It is not a de Polignac number, because 77421933 - 2²² = 73227629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77421913) 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, 61716 + ... + 62957.

It is an arithmetic number, because the mean of its divisors is an integer number (7480440).

Almost surely, 2^77421933 is an apocalyptic number.

It is an amenable number.

77421933 is a deficient number, since it is larger than the sum of its proper divisors (42265107).

77421933 is a wasteful number, since it uses less digits than its factorization.

77421933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124705 (or 124699 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 77421933 is about 8798.9734060287. The cubic root of 77421933 is about 426.2077443399.

The spelling of 77421933 in words is "seventy-seven million, four hundred twenty-one thousand, nine hundred thirty-three".