91819490 has 32 divisors (see below), whose sum is σ = 189955584. Its totient is φ = 31302720.

The previous prime is 91819487. The next prime is 91819531. The reversal of 91819490 is 9491819.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9047 + ... + 16293.

It is an arithmetic number, because the mean of its divisors is an integer number (5936112).

Almost surely, 2^91819490 is an apocalyptic number.

91819490 is an abundant number, since it is smaller than the sum of its proper divisors (98136094).

91819490 is a wasteful number, since it uses less digits than its factorization.

91819490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7442.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 91819490 is about 9582.2486922434. The cubic root of 91819490 is about 451.1403014474.

The spelling of 91819490 in words is "ninety-one million, eight hundred nineteen thousand, four hundred ninety".