91321254 has 24 divisors (see below), whose sum is σ = 203211840. Its totient is φ = 29617488.

The previous prime is 91321249. The next prime is 91321259. The reversal of 91321254 is 45212319.

91321254 is a `hidden beast` number, since 91 + 321 + 254 = 666.

It is an interprime number because it is at equal distance from previous prime (91321249) and next prime (91321259).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91321259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67894 + ... + 69225.

It is an arithmetic number, because the mean of its divisors is an integer number (8467160).

Almost surely, 2^91321254 is an apocalyptic number.

91321254 is an abundant number, since it is smaller than the sum of its proper divisors (111890586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91321254 is a wasteful number, since it uses less digits than its factorization.

91321254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137164 (or 137161 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 91321254 is about 9556.2154642934. The cubic root of 91321254 is about 450.3228202123.

The spelling of 91321254 in words is "ninety-one million, three hundred twenty-one thousand, two hundred fifty-four".