47317139 has 4 divisors (see below), whose sum is σ = 47331024. Its totient is φ = 47303256.

The previous prime is 47317133. The next prime is 47317177. The reversal of 47317139 is 93171374.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47317139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47317099 and 47317108.

It is not an unprimeable number, because it can be changed into a prime (47317133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2069 + ... + 9945.

It is an arithmetic number, because the mean of its divisors is an integer number (11832756).

Almost surely, 2^47317139 is an apocalyptic number.

47317139 is a deficient number, since it is larger than the sum of its proper divisors (13885).

47317139 is an equidigital number, since it uses as much as digits as its factorization.

47317139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13884.

The product of its digits is 15876, while the sum is 35.

The square root of 47317139 is about 6878.7454524790. The cubic root of 47317139 is about 361.6924909062.

The spelling of 47317139 in words is "forty-seven million, three hundred seventeen thousand, one hundred thirty-nine".