89261591 has 2 divisors, whose sum is σ = 89261592. Its totient is φ = 89261590.

The previous prime is 89261573. The next prime is 89261659. The reversal of 89261591 is 19516298.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89261591 is a prime.

It is equal to p_5176886 and since 89261591 and 5176886 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89261521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44630795 + 44630796.

It is an arithmetic number, because the mean of its divisors is an integer number (44630796).

Almost surely, 2^89261591 is an apocalyptic number.

89261591 is a deficient number, since it is larger than the sum of its proper divisors (1).

89261591 is an equidigital number, since it uses as much as digits as its factorization.

89261591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 41.

The square root of 89261591 is about 9447.8352547025. The cubic root of 89261591 is about 446.9115113272.

The spelling of 89261591 in words is "eighty-nine million, two hundred sixty-one thousand, five hundred ninety-one".