91257327 has 32 divisors (see below), whose sum is σ = 155458560. Its totient is φ = 51827040.

The previous prime is 91257319. The next prime is 91257329. The reversal of 91257327 is 72375219.

It is not a de Polignac number, because 91257327 - 2³ = 91257319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91257291 and 91257300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91257329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31302 + ... + 34092.

It is an arithmetic number, because the mean of its divisors is an integer number (4858080).

Almost surely, 2^91257327 is an apocalyptic number.

91257327 is a deficient number, since it is larger than the sum of its proper divisors (64201233).

91257327 is a wasteful number, since it uses less digits than its factorization.

91257327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2980 (or 2974 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 91257327 is about 9552.8700922812. The cubic root of 91257327 is about 450.2177168705.

The spelling of 91257327 in words is "ninety-one million, two hundred fifty-seven thousand, three hundred twenty-seven".