47311139 has 4 divisors (see below), whose sum is σ = 48203856. Its totient is φ = 46418424.

The previous prime is 47311111. The next prime is 47311141. The reversal of 47311139 is 93111374.

It is a happy number.

47311139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47311139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47311109) 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 in 3 ways as a sum of consecutive naturals, for example, 446279 + ... + 446384.

It is an arithmetic number, because the mean of its divisors is an integer number (12050964).

Almost surely, 2^47311139 is an apocalyptic number.

47311139 is a deficient number, since it is larger than the sum of its proper divisors (892717).

47311139 is an equidigital number, since it uses as much as digits as its factorization.

47311139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892716.

The product of its digits is 2268, while the sum is 29.

The square root of 47311139 is about 6878.3093126145. The cubic root of 47311139 is about 361.6772022481.

The spelling of 47311139 in words is "forty-seven million, three hundred eleven thousand, one hundred thirty-nine".