91426619 has 4 divisors (see below), whose sum is σ = 91524720. Its totient is φ = 91328520.

The previous prime is 91426607. The next prime is 91426639. The reversal of 91426619 is 91662419.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91426619 is a prime.

It is a super-2 number, since 2×91426619² = 16717653323542322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91426639) 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, 47639 + ... + 49520.

It is an arithmetic number, because the mean of its divisors is an integer number (22881180).

Almost surely, 2^91426619 is an apocalyptic number.

91426619 is a deficient number, since it is larger than the sum of its proper divisors (98101).

91426619 is an equidigital number, since it uses as much as digits as its factorization.

91426619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98100.

The product of its digits is 23328, while the sum is 38.

The square root of 91426619 is about 9561.7267791963. The cubic root of 91426619 is about 450.4959453984.

The spelling of 91426619 in words is "ninety-one million, four hundred twenty-six thousand, six hundred nineteen".