47323139 has 2 divisors, whose sum is σ = 47323140. Its totient is φ = 47323138.

The previous prime is 47323127. The next prime is 47323141. The reversal of 47323139 is 93132374.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47323139 is a prime.

Together with 47323141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47323039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23661569 + 23661570.

It is an arithmetic number, because the mean of its divisors is an integer number (23661570).

Almost surely, 2^47323139 is an apocalyptic number.

47323139 is a deficient number, since it is larger than the sum of its proper divisors (1).

47323139 is an equidigital number, since it uses as much as digits as its factorization.

47323139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 32.

The square root of 47323139 is about 6879.1815646921. The cubic root of 47323139 is about 361.7077782719.

The spelling of 47323139 in words is "forty-seven million, three hundred twenty-three thousand, one hundred thirty-nine".