772642317 has 4 divisors (see below), whose sum is σ = 1030189760. Its totient is φ = 515094876.

The previous prime is 772642267. The next prime is 772642319. The reversal of 772642317 is 713246277.

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.

It is not a de Polignac number, because 772642317 - 2¹¹ = 772640269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (772642319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128773717 + ... + 128773722.

It is an arithmetic number, because the mean of its divisors is an integer number (257547440).

Almost surely, 2^772642317 is an apocalyptic number.

It is an amenable number.

772642317 is a deficient number, since it is larger than the sum of its proper divisors (257547443).

772642317 is a wasteful number, since it uses less digits than its factorization.

772642317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257547442.

The product of its digits is 98784, while the sum is 39.

The square root of 772642317 is about 27796.4443229705. Note that the first 3 decimals coincide. The cubic root of 772642317 is about 917.6128714027.

The spelling of 772642317 in words is "seven hundred seventy-two million, six hundred forty-two thousand, three hundred seventeen".