91247484 has 12 divisors (see below), whose sum is σ = 212910824. Its totient is φ = 30415824.

The previous prime is 91247479. The next prime is 91247489. The reversal of 91247484 is 48474219.

It is an interprime number because it is at equal distance from previous prime (91247479) and next prime (91247489).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×91247484² = 16652206672660512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91247489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3801967 + ... + 3801990.

Almost surely, 2^91247484 is an apocalyptic number.

It is an amenable number.

91247484 is an abundant number, since it is smaller than the sum of its proper divisors (121663340).

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

91247484 is a wasteful number, since it uses less digits than its factorization.

91247484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7603964 (or 7603962 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 91247484 is about 9552.3548929047. The cubic root of 91247484 is about 450.2015294860.

The spelling of 91247484 in words is "ninety-one million, two hundred forty-seven thousand, four hundred eighty-four".