91160639 has 2 divisors, whose sum is σ = 91160640. Its totient is φ = 91160638.

The previous prime is 91160633. The next prime is 91160737. The reversal of 91160639 is 93606119.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91160639 - 2⁴ = 91160623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91160599 and 91160608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91160633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45580319 + 45580320.

It is an arithmetic number, because the mean of its divisors is an integer number (45580320).

Almost surely, 2^91160639 is an apocalyptic number.

91160639 is a deficient number, since it is larger than the sum of its proper divisors (1).

91160639 is an equidigital number, since it uses as much as digits as its factorization.

91160639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 91160639 is about 9547.8080730605. The cubic root of 91160639 is about 450.0586573743.

The spelling of 91160639 in words is "ninety-one million, one hundred sixty thousand, six hundred thirty-nine".