91271925 has 36 divisors (see below), whose sum is σ = 164274084. Its totient is φ = 48441600.

The previous prime is 91271909. The next prime is 91271927. The reversal of 91271925 is 52917219.

It can be written as a sum of positive squares in 6 ways, for example, as 35784324 + 55487601 = 5982^2 + 7449^2 .

It is not a de Polignac number, because 91271925 - 2⁴ = 91271909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91271925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91271927) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 51555 + ... + 53295.

It is an arithmetic number, because the mean of its divisors is an integer number (4563169).

Almost surely, 2^91271925 is an apocalyptic number.

It is an amenable number.

91271925 is a deficient number, since it is larger than the sum of its proper divisors (73002159).

91271925 is a wasteful number, since it uses less digits than its factorization.

91271925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990 (or 1982 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 91271925 is about 9553.6341252949. The cubic root of 91271925 is about 450.2417219852.

The spelling of 91271925 in words is "ninety-one million, two hundred seventy-one thousand, nine hundred twenty-five".