772917139 has 6 divisors (see below), whose sum is σ = 807983876. Its totient is φ = 739311540.

The previous prime is 772917137. The next prime is 772917143. The reversal of 772917139 is 931719277.

772917139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 772917139 - 2¹ = 772917137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (772917137) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 730017 + ... + 731074.

Almost surely, 2^772917139 is an apocalyptic number.

772917139 is a deficient number, since it is larger than the sum of its proper divisors (35066737).

772917139 is a wasteful number, since it uses less digits than its factorization.

772917139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461137 (or 1461114 counting only the distinct ones).

The product of its digits is 166698, while the sum is 46.

The square root of 772917139 is about 27801.3873574683. The cubic root of 772917139 is about 917.7216540850.

The spelling of 772917139 in words is "seven hundred seventy-two million, nine hundred seventeen thousand, one hundred thirty-nine".