77423137 has 16 divisors (see below), whose sum is σ = 85911552. Its totient is φ = 69189120.

The previous prime is 77423077. The next prime is 77423149. The reversal of 77423137 is 73132477.

It is not a de Polignac number, because 77423137 - 2¹¹ = 77421089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77420137) 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, 219153 + ... + 219505.

It is an arithmetic number, because the mean of its divisors is an integer number (5369472).

Almost surely, 2^77423137 is an apocalyptic number.

It is an amenable number.

77423137 is a deficient number, since it is larger than the sum of its proper divisors (8488415).

77423137 is a wasteful number, since it uses less digits than its factorization.

77423137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648.

The product of its digits is 24696, while the sum is 34.

The square root of 77423137 is about 8799.0418228350. The cubic root of 77423137 is about 426.2099536685.

The spelling of 77423137 in words is "seventy-seven million, four hundred twenty-three thousand, one hundred thirty-seven".