89190791 has 2 divisors, whose sum is σ = 89190792. Its totient is φ = 89190790.

The previous prime is 89190781. The next prime is 89190811. The reversal of 89190791 is 19709198.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89190791 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89190781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44595395 + 44595396.

It is an arithmetic number, because the mean of its divisors is an integer number (44595396).

Almost surely, 2^89190791 is an apocalyptic number.

89190791 is a deficient number, since it is larger than the sum of its proper divisors (1).

89190791 is an equidigital number, since it uses as much as digits as its factorization.

89190791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 44.

The square root of 89190791 is about 9444.0876213640. The cubic root of 89190791 is about 446.7933204979.

The spelling of 89190791 in words is "eighty-nine million, one hundred ninety thousand, seven hundred ninety-one".