772921493 has 4 divisors (see below), whose sum is σ = 773055360. Its totient is φ = 772787628.

The previous prime is 772921477. The next prime is 772921547. The reversal of 772921493 is 394129277.

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 772921493 - 2⁴ = 772921477 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 (772921433) 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, 57863 + ... + 69956.

It is an arithmetic number, because the mean of its divisors is an integer number (193263840).

Almost surely, 2^772921493 is an apocalyptic number.

It is an amenable number.

772921493 is a deficient number, since it is larger than the sum of its proper divisors (133867).

772921493 is a wasteful number, since it uses less digits than its factorization.

772921493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133866.

The product of its digits is 190512, while the sum is 44.

The square root of 772921493 is about 27801.4656628027. The cubic root of 772921493 is about 917.7233773196.

The spelling of 772921493 in words is "seven hundred seventy-two million, nine hundred twenty-one thousand, four hundred ninety-three".