47768639 has 2 divisors, whose sum is σ = 47768640. Its totient is φ = 47768638.

The previous prime is 47768629. The next prime is 47768647. The reversal of 47768639 is 93686774.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47768639 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47768629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23884319 + 23884320.

It is an arithmetic number, because the mean of its divisors is an integer number (23884320).

Almost surely, 2^47768639 is an apocalyptic number.

47768639 is a deficient number, since it is larger than the sum of its proper divisors (1).

47768639 is an equidigital number, since it uses as much as digits as its factorization.

47768639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 50.

The square root of 47768639 is about 6911.4860196632. The cubic root of 47768639 is about 362.8392739622.

The spelling of 47768639 in words is "forty-seven million, seven hundred sixty-eight thousand, six hundred thirty-nine".