825494691 has 32 divisors (see below), whose sum is σ = 1366835200. Its totient is φ = 432462240.

The previous prime is 825494647. The next prime is 825494723. The reversal of 825494691 is 196494528.

It is not a de Polignac number, because 825494691 - 2⁷ = 825494563 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 825494691.

It is not an unprimeable number, because it can be changed into a prime (825494641) 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, 21001 + ... + 45738.

It is an arithmetic number, because the mean of its divisors is an integer number (42713600).

Almost surely, 2^825494691 is an apocalyptic number.

825494691 is a deficient number, since it is larger than the sum of its proper divisors (541340509).

825494691 is a wasteful number, since it uses less digits than its factorization.

825494691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66799.

The product of its digits is 622080, while the sum is 48.

The square root of 825494691 is about 28731.4234071339. The cubic root of 825494691 is about 938.0761508788.

The spelling of 825494691 in words is "eight hundred twenty-five million, four hundred ninety-four thousand, six hundred ninety-one".