47312613 has 8 divisors (see below), whose sum is σ = 70092800. Its totient is φ = 31541724.

The previous prime is 47312609. The next prime is 47312621. The reversal of 47312613 is 31621374.

47312613 is a `hidden beast` number, since 47 + 3 + 1 + 2 + 613 = 666.

It is not a de Polignac number, because 47312613 - 2² = 47312609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1752319 = 47312613 / (4 + 7 + 3 + 1 + 2 + 6 + 1 + 3).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47312693) 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, 876133 + ... + 876186.

It is an arithmetic number, because the mean of its divisors is an integer number (8761600).

Almost surely, 2^47312613 is an apocalyptic number.

It is an amenable number.

47312613 is a deficient number, since it is larger than the sum of its proper divisors (22780187).

47312613 is a wasteful number, since it uses less digits than its factorization.

47312613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752328 (or 1752322 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 47312613 is about 6878.4164602036. The cubic root of 47312613 is about 361.6809582815.

Adding to 47312613 its reverse (31621374), we get a palindrome (78933987).

The spelling of 47312613 in words is "forty-seven million, three hundred twelve thousand, six hundred thirteen".