91989589259 has 2 divisors, whose sum is σ = 91989589260. Its totient is φ = 91989589258.

The previous prime is 91989589243. The next prime is 91989589297. The reversal of 91989589259 is 95298598919.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91989589259 - 2⁴ = 91989589243 is a prime.

It is not a weakly prime, because it can be changed into another prime (91989549259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45994794629 + 45994794630.

It is an arithmetic number, because the mean of its divisors is an integer number (45994794630).

Almost surely, 2^91989589259 is an apocalyptic number.

91989589259 is a deficient number, since it is larger than the sum of its proper divisors (1).

91989589259 is an equidigital number, since it uses as much as digits as its factorization.

91989589259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188956800, while the sum is 74.

The spelling of 91989589259 in words is "ninety-one billion, nine hundred eighty-nine million, five hundred eighty-nine thousand, two hundred fifty-nine".