91289959 has 2 divisors, whose sum is σ = 91289960. Its totient is φ = 91289958.

The previous prime is 91289953. The next prime is 91289969. The reversal of 91289959 is 95998219.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91289959 - 2⁷ = 91289831 is a prime.

It is a super-2 number, since 2×91289959² = 16667713228443362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91289953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45644979 + 45644980.

It is an arithmetic number, because the mean of its divisors is an integer number (45644980).

Almost surely, 2^91289959 is an apocalyptic number.

91289959 is a deficient number, since it is larger than the sum of its proper divisors (1).

91289959 is an equidigital number, since it uses as much as digits as its factorization.

91289959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 524880, while the sum is 52.

The square root of 91289959 is about 9554.5779079978. The cubic root of 91289959 is about 450.2713737630.

The spelling of 91289959 in words is "ninety-one million, two hundred eighty-nine thousand, nine hundred fifty-nine".