91488619 has 2 divisors, whose sum is σ = 91488620. Its totient is φ = 91488618.

The previous prime is 91488613. The next prime is 91488623. The reversal of 91488619 is 91688419.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91488619 - 2⁹ = 91488107 is a prime.

It is a super-2 number, since 2×91488619² = 16740334813054322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91488613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45744309 + 45744310.

It is an arithmetic number, because the mean of its divisors is an integer number (45744310).

Almost surely, 2^91488619 is an apocalyptic number.

91488619 is a deficient number, since it is larger than the sum of its proper divisors (1).

91488619 is an equidigital number, since it uses as much as digits as its factorization.

91488619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 46.

The square root of 91488619 is about 9564.9683219549. The cubic root of 91488619 is about 450.5977554170.

The spelling of 91488619 in words is "ninety-one million, four hundred eighty-eight thousand, six hundred nineteen".