91482391 has 32 divisors (see below), whose sum is σ = 124992000. Its totient is φ = 64644480.

The previous prime is 91482383. The next prime is 91482407. The reversal of 91482391 is 19328419.

It is a cyclic number.

It is not a de Polignac number, because 91482391 - 2³ = 91482383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91482391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91482301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58285 + ... + 59833.

It is an arithmetic number, because the mean of its divisors is an integer number (3906000).

Almost surely, 2^91482391 is an apocalyptic number.

91482391 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

91482391 is a deficient number, since it is larger than the sum of its proper divisors (33509609).

91482391 is a wasteful number, since it uses less digits than its factorization.

91482391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639.

The product of its digits is 15552, while the sum is 37.

The square root of 91482391 is about 9564.6427533913. The cubic root of 91482391 is about 450.5875305150.

The spelling of 91482391 in words is "ninety-one million, four hundred eighty-two thousand, three hundred ninety-one".