47686431 has 8 divisors (see below), whose sum is σ = 68472880. Its totient is φ = 29345472.

The previous prime is 47686427. The next prime is 47686433. The reversal of 47686431 is 13468674.

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

It is not a de Polignac number, because 47686431 - 2² = 47686427 is a prime.

It is a super-2 number, since 2×47686431² = 4547991403035522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 1222729 = 47686431 / (4 + 7 + 6 + 8 + 6 + 4 + 3 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47686431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47686433) 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, 611326 + ... + 611403.

It is an arithmetic number, because the mean of its divisors is an integer number (8559110).

Almost surely, 2^47686431 is an apocalyptic number.

47686431 is a deficient number, since it is larger than the sum of its proper divisors (20786449).

47686431 is a wasteful number, since it uses less digits than its factorization.

47686431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222745.

The product of its digits is 96768, while the sum is 39.

The square root of 47686431 is about 6905.5362572359. The cubic root of 47686431 is about 362.6310102760.

The spelling of 47686431 in words is "forty-seven million, six hundred eighty-six thousand, four hundred thirty-one".