47717431 has 2 divisors, whose sum is σ = 47717432. Its totient is φ = 47717430.

The previous prime is 47717429. The next prime is 47717477. The reversal of 47717431 is 13471774.

It is a happy number.

47717431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47717431 - 2¹ = 47717429 is a prime.

It is a super-2 number, since 2×47717431² = 4553906442479522, which contains 22 as substring.

Together with 47717429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47714431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23858715 + 23858716.

It is an arithmetic number, because the mean of its divisors is an integer number (23858716).

Almost surely, 2^47717431 is an apocalyptic number.

47717431 is a deficient number, since it is larger than the sum of its proper divisors (1).

47717431 is an equidigital number, since it uses as much as digits as its factorization.

47717431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16464, while the sum is 34.

The square root of 47717431 is about 6907.7804684283. The cubic root of 47717431 is about 362.7095729893.

The spelling of 47717431 in words is "forty-seven million, seven hundred seventeen thousand, four hundred thirty-one".