77422905 has 32 divisors (see below), whose sum is σ = 157305600. Its totient is φ = 35392896.

The previous prime is 77422901. The next prime is 77422909. The reversal of 77422905 is 50922477.

It is an interprime number because it is at equal distance from previous prime (77422901) and next prime (77422909).

It is not a de Polignac number, because 77422905 - 2² = 77422901 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 77422905.

It is not an unprimeable number, because it can be changed into a prime (77422901) 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 31 ways as a sum of consecutive naturals, for example, 40020 + ... + 41909.

It is an arithmetic number, because the mean of its divisors is an integer number (4915800).

Almost surely, 2^77422905 is an apocalyptic number.

It is an amenable number.

77422905 is an abundant number, since it is smaller than the sum of its proper divisors (79882695).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77422905 is a wasteful number, since it uses less digits than its factorization.

77422905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81950 (or 81944 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 77422905 is about 8799.0286395715. The cubic root of 77422905 is about 426.2095279524.

The spelling of 77422905 in words is "seventy-seven million, four hundred twenty-two thousand, nine hundred five".