8091613 has 4 divisors (see below), whose sum is σ = 8182620. Its totient is φ = 8000608.

The previous prime is 8091583. The next prime is 8091617. The reversal of 8091613 is 3161908.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3541924 + 4549689 = 1882^2 + 2133^2 .

It is a cyclic number.

It is not a de Polignac number, because 8091613 - 2¹⁷ = 7960541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8091617) 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, 45370 + ... + 45547.

It is an arithmetic number, because the mean of its divisors is an integer number (2045655).

Almost surely, 2^8091613 is an apocalyptic number.

It is an amenable number.

8091613 is a deficient number, since it is larger than the sum of its proper divisors (91007).

8091613 is an equidigital number, since it uses as much as digits as its factorization.

8091613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91006.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 8091613 is about 2844.5760668332. The cubic root of 8091613 is about 200.7605458507.

The spelling of 8091613 in words is "eight million, ninety-one thousand, six hundred thirteen".