91914690 has 96 divisors (see below), whose sum is σ = 265019904. Its totient is φ = 20321280.

The previous prime is 91914689. The next prime is 91914703. The reversal of 91914690 is 9641919.

It is a super-2 number, since 2×91914690² = 16896620475592200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44562 + ... + 46578.

It is an arithmetic number, because the mean of its divisors is an integer number (2760624).

Almost surely, 2^91914690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91914690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132509952).

91914690 is an abundant number, since it is smaller than the sum of its proper divisors (173105214).

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

91914690 is a wasteful number, since it uses less digits than its factorization.

91914690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2072 (or 2065 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 91914690 is about 9587.2149240538. The cubic root of 91914690 is about 451.2961642240.

The spelling of 91914690 in words is "ninety-one million, nine hundred fourteen thousand, six hundred ninety".