47874779 has 2 divisors, whose sum is σ = 47874780. Its totient is φ = 47874778.

The previous prime is 47874769. The next prime is 47874793. The reversal of 47874779 is 97747874.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47874779 - 2⁴ = 47874763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47874779.

It is not a weakly prime, because it can be changed into another prime (47874719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23937389 + 23937390.

It is an arithmetic number, because the mean of its divisors is an integer number (23937390).

Almost surely, 2^47874779 is an apocalyptic number.

47874779 is a deficient number, since it is larger than the sum of its proper divisors (1).

47874779 is an equidigital number, since it uses as much as digits as its factorization.

47874779 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 47874779 is about 6919.1602814214. The cubic root of 47874779 is about 363.1078132705.

It can be divided in two parts, 478 and 74779, that added together give a palindrome (75257).

The spelling of 47874779 in words is "forty-seven million, eight hundred seventy-four thousand, seven hundred seventy-nine".