91954169 has 2 divisors, whose sum is σ = 91954170. Its totient is φ = 91954168.

The previous prime is 91954151. The next prime is 91954189. The reversal of 91954169 is 96145919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83905600 + 8048569 = 9160^2 + 2837^2 .

It is a cyclic number.

It is not a de Polignac number, because 91954169 - 2¹² = 91950073 is a prime.

It is a super-2 number, since 2×91954169² = 16911138392961122, 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 (91954189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45977084 + 45977085.

It is an arithmetic number, because the mean of its divisors is an integer number (45977085).

Almost surely, 2^91954169 is an apocalyptic number.

It is an amenable number.

91954169 is a deficient number, since it is larger than the sum of its proper divisors (1).

91954169 is an equidigital number, since it uses as much as digits as its factorization.

91954169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 44.

The square root of 91954169 is about 9589.2736429826. The cubic root of 91954169 is about 451.3607682281.

The spelling of 91954169 in words is "ninety-one million, nine hundred fifty-four thousand, one hundred sixty-nine".