91536919 has 2 divisors, whose sum is σ = 91536920. Its totient is φ = 91536918.

The previous prime is 91536911. The next prime is 91536931. The reversal of 91536919 is 91963519.

It is a weak prime.

It is an emirp because it is prime and its reverse (91963519) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91536919 - 2³ = 91536911 is a prime.

It is a super-2 number, since 2×91536919² = 16758015080025122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91536911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45768459 + 45768460.

It is an arithmetic number, because the mean of its divisors is an integer number (45768460).

Almost surely, 2^91536919 is an apocalyptic number.

91536919 is a deficient number, since it is larger than the sum of its proper divisors (1).

91536919 is an equidigital number, since it uses as much as digits as its factorization.

91536919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65610, while the sum is 43.

The square root of 91536919 is about 9567.4928272772. The cubic root of 91536919 is about 450.6770368365.

The spelling of 91536919 in words is "ninety-one million, five hundred thirty-six thousand, nine hundred nineteen".