772246921 has 4 divisors (see below), whose sum is σ = 797158144. Its totient is φ = 747335700.

The previous prime is 772246901. The next prime is 772246939. The reversal of 772246921 is 129642277.

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 a cyclic number.

It is not a de Polignac number, because 772246921 - 2⁵ = 772246889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (772246901) 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, 12455565 + ... + 12455626.

It is an arithmetic number, because the mean of its divisors is an integer number (199289536).

Almost surely, 2^772246921 is an apocalyptic number.

It is an amenable number.

772246921 is a deficient number, since it is larger than the sum of its proper divisors (24911223).

772246921 is a wasteful number, since it uses less digits than its factorization.

772246921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24911222.

The product of its digits is 84672, while the sum is 40.

The square root of 772246921 is about 27789.3310642772. The cubic root of 772246921 is about 917.4563166990.

The spelling of 772246921 in words is "seven hundred seventy-two million, two hundred forty-six thousand, nine hundred twenty-one".