77422457 has 4 divisors (see below), whose sum is σ = 88482816. Its totient is φ = 66362100.

The previous prime is 77422451. The next prime is 77422507. The reversal of 77422457 is 75422477.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75422477 = 13 ⋅5801729.

It is not a de Polignac number, because 77422457 - 2⁸ = 77422201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77422457.

It is not an unprimeable number, because it can be changed into a prime (77422451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5530169 + ... + 5530182.

It is an arithmetic number, because the mean of its divisors is an integer number (22120704).

Almost surely, 2^77422457 is an apocalyptic number.

It is an amenable number.

77422457 is a deficient number, since it is larger than the sum of its proper divisors (11060359).

77422457 is a wasteful number, since it uses less digits than its factorization.

77422457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11060358.

The product of its digits is 109760, while the sum is 38.

The square root of 77422457 is about 8799.0031821792. The cubic root of 77422457 is about 426.2087058777.

The spelling of 77422457 in words is "seventy-seven million, four hundred twenty-two thousand, four hundred fifty-seven".