47884909 has 2 divisors, whose sum is σ = 47884910. Its totient is φ = 47884908.

The previous prime is 47884897. The next prime is 47884933. The reversal of 47884909 is 90948874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38564100 + 9320809 = 6210^2 + 3053^2 .

It is a cyclic number.

It is not a de Polignac number, because 47884909 - 2⁵ = 47884877 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47884979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23942454 + 23942455.

It is an arithmetic number, because the mean of its divisors is an integer number (23942455).

Almost surely, 2^47884909 is an apocalyptic number.

It is an amenable number.

47884909 is a deficient number, since it is larger than the sum of its proper divisors (1).

47884909 is an equidigital number, since it uses as much as digits as its factorization.

47884909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 47884909 is about 6919.8922679475. The cubic root of 47884909 is about 363.1334219022.

The spelling of 47884909 in words is "forty-seven million, eight hundred eighty-four thousand, nine hundred nine".