772621491 has 32 divisors (see below), whose sum is σ = 1151884800. Its totient is φ = 457781760.

The previous prime is 772621483. The next prime is 772621517. The reversal of 772621491 is 194126277.

It is not a de Polignac number, because 772621491 - 2³ = 772621483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (772621481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 346761 + ... + 348981.

It is an arithmetic number, because the mean of its divisors is an integer number (35996400).

Almost surely, 2^772621491 is an apocalyptic number.

772621491 is a deficient number, since it is larger than the sum of its proper divisors (379263309).

772621491 is a wasteful number, since it uses less digits than its factorization.

772621491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2619.

The product of its digits is 42336, while the sum is 39.

The square root of 772621491 is about 27796.0697041866. The cubic root of 772621491 is about 917.6046268041.

The spelling of 772621491 in words is "seven hundred seventy-two million, six hundred twenty-one thousand, four hundred ninety-one".