91535013 has 6 divisors (see below), whose sum is σ = 132217254. Its totient is φ = 61023336.

The previous prime is 91534981. The next prime is 91535023. The reversal of 91535013 is 31053519.

91535013 is a `hidden beast` number, since 9 + 153 + 501 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 90954369 + 580644 = 9537^2 + 762^2 .

It is not a de Polignac number, because 91535013 - 2⁵ = 91534981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91535023) 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, 5085270 + ... + 5085287.

It is an arithmetic number, because the mean of its divisors is an integer number (22036209).

Almost surely, 2^91535013 is an apocalyptic number.

It is an amenable number.

91535013 is a deficient number, since it is larger than the sum of its proper divisors (40682241).

91535013 is a wasteful number, since it uses less digits than its factorization.

91535013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10170563 (or 10170560 counting only the distinct ones).

The product of its (nonzero) digits is 2025, while the sum is 27.

The square root of 91535013 is about 9567.3932186359. The cubic root of 91535013 is about 450.6739087857.

The spelling of 91535013 in words is "ninety-one million, five hundred thirty-five thousand, thirteen".