47779847 has 2 divisors, whose sum is σ = 47779848. Its totient is φ = 47779846.

The previous prime is 47779841. The next prime is 47779859. The reversal of 47779847 is 74897774.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47779847 - 2⁶ = 47779783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47779841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23889923 + 23889924.

It is an arithmetic number, because the mean of its divisors is an integer number (23889924).

Almost surely, 2^47779847 is an apocalyptic number.

47779847 is a deficient number, since it is larger than the sum of its proper divisors (1).

47779847 is an equidigital number, since it uses as much as digits as its factorization.

47779847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2765952, while the sum is 53.

The square root of 47779847 is about 6912.2967962899. The cubic root of 47779847 is about 362.8676495146.

The spelling of 47779847 in words is "forty-seven million, seven hundred seventy-nine thousand, eight hundred forty-seven".