47776639 has 2 divisors, whose sum is σ = 47776640. Its totient is φ = 47776638.

The previous prime is 47776627. The next prime is 47776649. The reversal of 47776639 is 93667774.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47776639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 47776592 and 47776601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47776649) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23888319 + 23888320.

It is an arithmetic number, because the mean of its divisors is an integer number (23888320).

Almost surely, 2^47776639 is an apocalyptic number.

47776639 is a deficient number, since it is larger than the sum of its proper divisors (1).

47776639 is an equidigital number, since it uses as much as digits as its factorization.

47776639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1333584, while the sum is 49.

The square root of 47776639 is about 6912.0647421736. The cubic root of 47776639 is about 362.8595282003.

The spelling of 47776639 in words is "forty-seven million, seven hundred seventy-six thousand, six hundred thirty-nine".