47778047 has 2 divisors, whose sum is σ = 47778048. Its totient is φ = 47778046.

The previous prime is 47778043. The next prime is 47778089. The reversal of 47778047 is 74087774.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47778047 - 2² = 47778043 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 47777989 and 47778007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47778043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23889023 + 23889024.

It is an arithmetic number, because the mean of its divisors is an integer number (23889024).

Almost surely, 2^47778047 is an apocalyptic number.

47778047 is a deficient number, since it is larger than the sum of its proper divisors (1).

47778047 is an equidigital number, since it uses as much as digits as its factorization.

47778047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 307328, while the sum is 44.

The square root of 47778047 is about 6912.1665923211. The cubic root of 47778047 is about 362.8630927122.

The spelling of 47778047 in words is "forty-seven million, seven hundred seventy-eight thousand, forty-seven".