91326261 has 64 divisors (see below), whose sum is σ = 148925952. Its totient is φ = 49201152.

The previous prime is 91326259. The next prime is 91326271. The reversal of 91326261 is 16262319.

It is not a de Polignac number, because 91326261 - 2¹ = 91326259 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91326251) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 808141 + ... + 808253.

It is an arithmetic number, because the mean of its divisors is an integer number (2326968).

Almost surely, 2^91326261 is an apocalyptic number.

It is an amenable number.

91326261 is a deficient number, since it is larger than the sum of its proper divisors (57599691).

91326261 is a wasteful number, since it uses less digits than its factorization.

91326261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222.

The product of its digits is 3888, while the sum is 30.

The square root of 91326261 is about 9556.4774367965. The cubic root of 91326261 is about 450.3310502247.

The spelling of 91326261 in words is "ninety-one million, three hundred twenty-six thousand, two hundred sixty-one".