75685513 has 8 divisors (see below), whose sum is σ = 80725032. Its totient is φ = 70711296.

The previous prime is 75685501. The next prime is 75685553. The reversal of 75685513 is 31558657.

It can be written as a sum of positive squares in 4 ways, for example, as 35844169 + 39841344 = 5987^2 + 6312^2 .

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

It is not a de Polignac number, because 75685513 - 2⁵ = 75685481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75685553) 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, 13920 + ... + 18577.

It is an arithmetic number, because the mean of its divisors is an integer number (10090629).

Almost surely, 2^75685513 is an apocalyptic number.

It is an amenable number.

75685513 is a deficient number, since it is larger than the sum of its proper divisors (5039519).

75685513 is a wasteful number, since it uses less digits than its factorization.

75685513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32651.

The product of its digits is 126000, while the sum is 40.

The square root of 75685513 is about 8699.7421226149. The cubic root of 75685513 is about 422.9972912732.

The spelling of 75685513 in words is "seventy-five million, six hundred eighty-five thousand, five hundred thirteen".