791363521 has 8 divisors (see below), whose sum is σ = 859781160. Its totient is φ = 724023552.

The previous prime is 791363483. The next prime is 791363561. The reversal of 791363521 is 125363197.

It can be written as a sum of positive squares in 4 ways, for example, as 2371600 + 788991921 = 1540^2 + 28089^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 791363521 - 2¹³ = 791355329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (791363561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267886 + ... + 270823.

It is an arithmetic number, because the mean of its divisors is an integer number (107472645).

Almost surely, 2^791363521 is an apocalyptic number.

It is an amenable number.

791363521 is a deficient number, since it is larger than the sum of its proper divisors (68417639).

791363521 is a wasteful number, since it uses less digits than its factorization.

791363521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538835.

The product of its digits is 34020, while the sum is 37.

The square root of 791363521 is about 28131.1841378922. The cubic root of 791363521 is about 924.9650908666.

The spelling of 791363521 in words is "seven hundred ninety-one million, three hundred sixty-three thousand, five hundred twenty-one".