47779943 has 2 divisors, whose sum is σ = 47779944. Its totient is φ = 47779942.

The previous prime is 47779931. The next prime is 47779957. The reversal of 47779943 is 34997774.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47779943 - 2⁸ = 47779687 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 47779891 and 47779900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47779973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23889971 + 23889972.

It is an arithmetic number, because the mean of its divisors is an integer number (23889972).

Almost surely, 2^47779943 is an apocalyptic number.

47779943 is a deficient number, since it is larger than the sum of its proper divisors (1).

47779943 is an equidigital number, since it uses as much as digits as its factorization.

47779943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 50.

The square root of 47779943 is about 6912.3037404327. The cubic root of 47779943 is about 362.8678925409.

The spelling of 47779943 in words is "forty-seven million, seven hundred seventy-nine thousand, nine hundred forty-three".