91500601 has 6 divisors (see below), whose sum is σ = 95652410. Its totient is φ = 87521808.

The previous prime is 91500571. The next prime is 91500653. The reversal of 91500601 is 10600519.

It can be written as a sum of positive squares in only one way, i.e., 51494976 + 40005625 = 7176^2 + 6325^2 .

It is not a de Polignac number, because 91500601 - 2⁷ = 91500473 is a prime.

It is a super-2 number, since 2×91500601² = 16744719966722402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91500401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85956 + ... + 87013.

Almost surely, 2^91500601 is an apocalyptic number.

It is an amenable number.

91500601 is a deficient number, since it is larger than the sum of its proper divisors (4151809).

91500601 is a wasteful number, since it uses less digits than its factorization.

91500601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173015 (or 172992 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 91500601 is about 9565.5946495762. The cubic root of 91500601 is about 450.6174257202.

The spelling of 91500601 in words is "ninety-one million, five hundred thousand, six hundred one".