91426169 has 2 divisors, whose sum is σ = 91426170. Its totient is φ = 91426168.

The previous prime is 91426163. The next prime is 91426193. The reversal of 91426169 is 96162419.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64000000 + 27426169 = 8000^2 + 5237^2 .

It is an emirp because it is prime and its reverse (96162419) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91426169 is a prime.

It is a super-2 number, since 2×91426169² = 16717488756033122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (91426163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45713084 + 45713085.

It is an arithmetic number, because the mean of its divisors is an integer number (45713085).

Almost surely, 2^91426169 is an apocalyptic number.

It is an amenable number.

91426169 is a deficient number, since it is larger than the sum of its proper divisors (1).

91426169 is an equidigital number, since it uses as much as digits as its factorization.

91426169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 38.

The square root of 91426169 is about 9561.7032478529. The cubic root of 91426169 is about 450.4952062865.

The spelling of 91426169 in words is "ninety-one million, four hundred twenty-six thousand, one hundred sixty-nine".