91536169 has 2 divisors, whose sum is σ = 91536170. Its totient is φ = 91536168.

The previous prime is 91536163. The next prime is 91536197. The reversal of 91536169 is 96163519.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91298025 + 238144 = 9555^2 + 488^2 .

It is a cyclic number.

It is not a de Polignac number, because 91536169 - 2¹³ = 91527977 is a prime.

It is a super-2 number, since 2×91536169² = 16757740470393122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91536163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45768084 + 45768085.

It is an arithmetic number, because the mean of its divisors is an integer number (45768085).

Almost surely, 2^91536169 is an apocalyptic number.

It is an amenable number.

91536169 is a deficient number, since it is larger than the sum of its proper divisors (1).

91536169 is an equidigital number, since it uses as much as digits as its factorization.

91536169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43740, while the sum is 40.

The square root of 91536169 is about 9567.4536319754. The cubic root of 91536169 is about 450.6758059718.

The spelling of 91536169 in words is "ninety-one million, five hundred thirty-six thousand, one hundred sixty-nine".