91010365 has 8 divisors (see below), whose sum is σ = 111876408. Its totient is φ = 71032320.

The previous prime is 91010357. The next prime is 91010369. The reversal of 91010365 is 56301019.

It can be written as a sum of positive squares in 4 ways, for example, as 1196836 + 89813529 = 1094^2 + 9477^2 .

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

It is not a de Polignac number, because 91010365 - 2³ = 91010357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91010369) 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, 221772 + ... + 222181.

It is an arithmetic number, because the mean of its divisors is an integer number (13984551).

Almost surely, 2^91010365 is an apocalyptic number.

It is an amenable number.

91010365 is a deficient number, since it is larger than the sum of its proper divisors (20866043).

91010365 is a wasteful number, since it uses less digits than its factorization.

91010365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443999.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 91010365 is about 9539.9352723171. The cubic root of 91010365 is about 449.8112212283.

The spelling of 91010365 in words is "ninety-one million, ten thousand, three hundred sixty-five".