47847157 has 2 divisors, whose sum is σ = 47847158. Its totient is φ = 47847156.

The previous prime is 47847143. The next prime is 47847203. The reversal of 47847157 is 75174874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39050001 + 8797156 = 6249^2 + 2966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47847157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47847127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23923578 + 23923579.

It is an arithmetic number, because the mean of its divisors is an integer number (23923579).

Almost surely, 2^47847157 is an apocalyptic number.

It is an amenable number.

47847157 is a deficient number, since it is larger than the sum of its proper divisors (1).

47847157 is an equidigital number, since it uses as much as digits as its factorization.

47847157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 219520, while the sum is 43.

The square root of 47847157 is about 6917.1639419635. The cubic root of 47847157 is about 363.0379665177.

The spelling of 47847157 in words is "forty-seven million, eight hundred forty-seven thousand, one hundred fifty-seven".