47339639 has 2 divisors, whose sum is σ = 47339640. Its totient is φ = 47339638.

The previous prime is 47339597. The next prime is 47339671. The reversal of 47339639 is 93693374.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47339639 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47339639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47339839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23669819 + 23669820.

It is an arithmetic number, because the mean of its divisors is an integer number (23669820).

Almost surely, 2^47339639 is an apocalyptic number.

47339639 is a deficient number, since it is larger than the sum of its proper divisors (1).

47339639 is an equidigital number, since it uses as much as digits as its factorization.

47339639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 44.

The square root of 47339639 is about 6880.3807307445. The cubic root of 47339639 is about 361.7498118659.

The spelling of 47339639 in words is "forty-seven million, three hundred thirty-nine thousand, six hundred thirty-nine".