47891429 has 2 divisors, whose sum is σ = 47891430. Its totient is φ = 47891428.

The previous prime is 47891413. The next prime is 47891443. The reversal of 47891429 is 92419874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44289025 + 3602404 = 6655^2 + 1898^2 .

It is a cyclic number.

It is not a de Polignac number, because 47891429 - 2⁴ = 47891413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47891429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47881429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23945714 + 23945715.

It is an arithmetic number, because the mean of its divisors is an integer number (23945715).

Almost surely, 2^47891429 is an apocalyptic number.

It is an amenable number.

47891429 is a deficient number, since it is larger than the sum of its proper divisors (1).

47891429 is an equidigital number, since it uses as much as digits as its factorization.

47891429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 44.

The square root of 47891429 is about 6920.3633575124. The cubic root of 47891429 is about 363.1499025465.

The spelling of 47891429 in words is "forty-seven million, eight hundred ninety-one thousand, four hundred twenty-nine".