47018857 has 2 divisors, whose sum is σ = 47018858. Its totient is φ = 47018856.

The previous prime is 47018849. The next prime is 47018879. The reversal of 47018857 is 75881074.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46457856 + 561001 = 6816^2 + 749^2 .

It is a cyclic number.

It is not a de Polignac number, because 47018857 - 2³ = 47018849 is a prime.

It is not a weakly prime, because it can be changed into another prime (47018837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23509428 + 23509429.

It is an arithmetic number, because the mean of its divisors is an integer number (23509429).

Almost surely, 2^47018857 is an apocalyptic number.

It is an amenable number.

47018857 is a deficient number, since it is larger than the sum of its proper divisors (1).

47018857 is an equidigital number, since it uses as much as digits as its factorization.

47018857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 47018857 is about 6857.0297505553. The cubic root of 47018857 is about 360.9308651304.

The spelling of 47018857 in words is "forty-seven million, eighteen thousand, eight hundred fifty-seven".