89138591 has 2 divisors, whose sum is σ = 89138592. Its totient is φ = 89138590.

The previous prime is 89138579. The next prime is 89138611. The reversal of 89138591 is 19583198.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89138591 - 2²² = 84944287 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 (89138561) 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, 44569295 + 44569296.

It is an arithmetic number, because the mean of its divisors is an integer number (44569296).

Almost surely, 2^89138591 is an apocalyptic number.

89138591 is a deficient number, since it is larger than the sum of its proper divisors (1).

89138591 is an equidigital number, since it uses as much as digits as its factorization.

89138591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 44.

The square root of 89138591 is about 9441.3235830576. The cubic root of 89138591 is about 446.7061397382.

The spelling of 89138591 in words is "eighty-nine million, one hundred thirty-eight thousand, five hundred ninety-one".