91954165 has 4 divisors (see below), whose sum is σ = 110345004. Its totient is φ = 73563328.

The previous prime is 91954151. The next prime is 91954169. The reversal of 91954165 is 56145919.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42068196 + 49885969 = 6486^2 + 7063^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91954165 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91954169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9195412 + ... + 9195421.

It is an arithmetic number, because the mean of its divisors is an integer number (27586251).

Almost surely, 2^91954165 is an apocalyptic number.

It is an amenable number.

91954165 is a deficient number, since it is larger than the sum of its proper divisors (18390839).

91954165 is a wasteful number, since it uses less digits than its factorization.

91954165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18390838.

The product of its digits is 48600, while the sum is 40.

The square root of 91954165 is about 9589.2734344162. The cubic root of 91954165 is about 451.3607616833.

The spelling of 91954165 in words is "ninety-one million, nine hundred fifty-four thousand, one hundred sixty-five".