91822725 has 72 divisors (see below), whose sum is σ = 177191040. Its totient is φ = 45308160.

The previous prime is 91822721. The next prime is 91822741. The reversal of 91822725 is 52722819.

It is not a de Polignac number, because 91822725 - 2² = 91822721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91822725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91822721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 200697 + ... + 201153.

Almost surely, 2^91822725 is an apocalyptic number.

91822725 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

91822725 is a deficient number, since it is larger than the sum of its proper divisors (85368315).

91822725 is a wasteful number, since it uses less digits than its factorization.

91822725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 531 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 91822725 is about 9582.4174924703. The cubic root of 91822725 is about 451.1455996027.

The spelling of 91822725 in words is "ninety-one million, eight hundred twenty-two thousand, seven hundred twenty-five".