91945265 has 8 divisors (see below), whose sum is σ = 116824680. Its totient is φ = 69229312.

The previous prime is 91945253. The next prime is 91945267. The reversal of 91945265 is 56254919.

It can be written as a sum of positive squares in 4 ways, for example, as 16394401 + 75550864 = 4049^2 + 8692^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91945265 - 2¹⁸ = 91683121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91945267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 540770 + ... + 540939.

It is an arithmetic number, because the mean of its divisors is an integer number (14603085).

Almost surely, 2^91945265 is an apocalyptic number.

It is an amenable number.

91945265 is a deficient number, since it is larger than the sum of its proper divisors (24879415).

91945265 is a wasteful number, since it uses less digits than its factorization.

91945265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081731.

The product of its digits is 97200, while the sum is 41.

The square root of 91945265 is about 9588.8093630023. The cubic root of 91945265 is about 451.3461992094.

The spelling of 91945265 in words is "ninety-one million, nine hundred forty-five thousand, two hundred sixty-five".