91408525 has 48 divisors (see below), whose sum is σ = 130616640. Its totient is φ = 62899200.

The previous prime is 91408511. The next prime is 91408531. The reversal of 91408525 is 52580419.

It is not a de Polignac number, because 91408525 - 2⁷ = 91408397 is a prime.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 697710 + ... + 697840.

It is an arithmetic number, because the mean of its divisors is an integer number (2721180).

Almost surely, 2^91408525 is an apocalyptic number.

91408525 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

91408525 is a deficient number, since it is larger than the sum of its proper divisors (39208115).

91408525 is a wasteful number, since it uses less digits than its factorization.

91408525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 91408525 is about 9560.7805643682. The cubic root of 91408525 is about 450.4662246179.

The spelling of 91408525 in words is "ninety-one million, four hundred eight thousand, five hundred twenty-five".