47957191 has 2 divisors, whose sum is σ = 47957192. Its totient is φ = 47957190.

The previous prime is 47957183. The next prime is 47957207. The reversal of 47957191 is 19175974.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47957191 - 2³ = 47957183 is a prime.

It is a super-2 number, since 2×47957191² = 4599784337220962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47957101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23978595 + 23978596.

It is an arithmetic number, because the mean of its divisors is an integer number (23978596).

Almost surely, 2^47957191 is an apocalyptic number.

47957191 is a deficient number, since it is larger than the sum of its proper divisors (1).

47957191 is an equidigital number, since it uses as much as digits as its factorization.

47957191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79380, while the sum is 43.

The square root of 47957191 is about 6925.1130676690. The cubic root of 47957191 is about 363.3160459936.

The spelling of 47957191 in words is "forty-seven million, nine hundred fifty-seven thousand, one hundred ninety-one".