91914550 has 48 divisors (see below), whose sum is σ = 210424032. Its totient is φ = 29088000.

The previous prime is 91914547. The next prime is 91914569. The reversal of 91914550 is 5541919.

It is a happy number.

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 23 ways as a sum of consecutive naturals, for example, 5551 + ... + 14650.

It is an arithmetic number, because the mean of its divisors is an integer number (4383834).

Almost surely, 2^91914550 is an apocalyptic number.

91914550 is an abundant number, since it is smaller than the sum of its proper divisors (118509482).

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

91914550 is a wasteful number, since it uses less digits than its factorization.

91914550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20233 (or 20228 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 91914550 is about 9587.2076226605. The cubic root of 91914550 is about 451.2959350931.

The spelling of 91914550 in words is "ninety-one million, nine hundred fourteen thousand, five hundred fifty".