91873025 has 6 divisors (see below), whose sum is σ = 113922582. Its totient is φ = 73498400.

The previous prime is 91873021. The next prime is 91873027. The reversal of 91873025 is 52037819.

It can be written as a sum of positive squares in 3 ways, for example, as 14010049 + 77862976 = 3743^2 + 8824^2 .

It is not a de Polignac number, because 91873025 - 2² = 91873021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91873021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1837436 + ... + 1837485.

It is an arithmetic number, because the mean of its divisors is an integer number (18987097).

Almost surely, 2^91873025 is an apocalyptic number.

It is an amenable number.

91873025 is a deficient number, since it is larger than the sum of its proper divisors (22049557).

91873025 is a wasteful number, since it uses less digits than its factorization.

91873025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3674931 (or 3674926 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 91873025 is about 9585.0417317819. The cubic root of 91873025 is about 451.2279629511.

The spelling of 91873025 in words is "ninety-one million, eight hundred seventy-three thousand, twenty-five".