47972191 has 2 divisors, whose sum is σ = 47972192. Its totient is φ = 47972190.

The previous prime is 47972167. The next prime is 47972203. The reversal of 47972191 is 19127974.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47972191 - 2⁷ = 47972063 is a prime.

It is a super-2 number, since 2×47972191² = 4602662218680962, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47978191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23986095 + 23986096.

It is an arithmetic number, because the mean of its divisors is an integer number (23986096).

Almost surely, 2^47972191 is an apocalyptic number.

47972191 is a deficient number, since it is larger than the sum of its proper divisors (1).

47972191 is an equidigital number, since it uses as much as digits as its factorization.

47972191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 40.

The square root of 47972191 is about 6926.1959978043. The cubic root of 47972191 is about 363.3539212492.

The spelling of 47972191 in words is "forty-seven million, nine hundred seventy-two thousand, one hundred ninety-one".