85707513 has 12 divisors (see below), whose sum is σ = 123926868. Its totient is φ = 57079680.

The previous prime is 85707511. The next prime is 85707533. The reversal of 85707513 is 31570758.

85707513 is a `hidden beast` number, since 8 + 570 + 75 + 13 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 48399849 + 37307664 = 6957^2 + 6108^2 .

It is not a de Polignac number, because 85707513 - 2¹ = 85707511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85707511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5533 + ... + 14213.

It is an arithmetic number, because the mean of its divisors is an integer number (10327239).

Almost surely, 2^85707513 is an apocalyptic number.

It is an amenable number.

85707513 is a deficient number, since it is larger than the sum of its proper divisors (38219355).

85707513 is a wasteful number, since it uses less digits than its factorization.

85707513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9784 (or 9781 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The square root of 85707513 is about 9257.8352221240. The cubic root of 85707513 is about 440.8995251380.

The spelling of 85707513 in words is "eighty-five million, seven hundred seven thousand, five hundred thirteen".