91251365 has 8 divisors (see below), whose sum is σ = 110070168. Its totient is φ = 72622080.

The previous prime is 91251353. The next prime is 91251403. The reversal of 91251365 is 56315219.

It can be written as a sum of positive squares in 4 ways, for example, as 201601 + 91049764 = 449^2 + 9542^2 .

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

It is not a de Polignac number, because 91251365 - 2¹² = 91247269 is a prime.

It is a super-2 number, since 2×91251365² = 16653623228726450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46316 + ... + 48245.

It is an arithmetic number, because the mean of its divisors is an integer number (13758771).

Almost surely, 2^91251365 is an apocalyptic number.

It is an amenable number.

91251365 is a deficient number, since it is larger than the sum of its proper divisors (18818803).

91251365 is a wasteful number, since it uses less digits than its factorization.

91251365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94759.

The product of its digits is 8100, while the sum is 32.

The square root of 91251365 is about 9552.5580343696. The cubic root of 91251365 is about 450.2079121546.

The spelling of 91251365 in words is "ninety-one million, two hundred fifty-one thousand, three hundred sixty-five".