87113591 has 2 divisors, whose sum is σ = 87113592. Its totient is φ = 87113590.

The previous prime is 87113549. The next prime is 87113603. The reversal of 87113591 is 19531178.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87113591 - 2¹⁸ = 86851447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87113501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43556795 + 43556796.

It is an arithmetic number, because the mean of its divisors is an integer number (43556796).

Almost surely, 2^87113591 is an apocalyptic number.

87113591 is a deficient number, since it is larger than the sum of its proper divisors (1).

87113591 is an equidigital number, since it uses as much as digits as its factorization.

87113591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 35.

The square root of 87113591 is about 9333.4661835783. The cubic root of 87113591 is about 443.2975239448.

The spelling of 87113591 in words is "eighty-seven million, one hundred thirteen thousand, five hundred ninety-one".