91887559 has 2 divisors, whose sum is σ = 91887560. Its totient is φ = 91887558.

The previous prime is 91887527. The next prime is 91887563. The reversal of 91887559 is 95578819.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91887559 - 2⁵ = 91887527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91887569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45943779 + 45943780.

It is an arithmetic number, because the mean of its divisors is an integer number (45943780).

Almost surely, 2^91887559 is an apocalyptic number.

91887559 is a deficient number, since it is larger than the sum of its proper divisors (1).

91887559 is an equidigital number, since it uses as much as digits as its factorization.

91887559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 52.

The square root of 91887559 is about 9585.7998622963. The cubic root of 91887559 is about 451.2517559394.

The spelling of 91887559 in words is "ninety-one million, eight hundred eighty-seven thousand, five hundred fifty-nine".