47870191 has 2 divisors, whose sum is σ = 47870192. Its totient is φ = 47870190.

The previous prime is 47870189. The next prime is 47870219. The reversal of 47870191 is 19107874.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47870191 - 2¹ = 47870189 is a prime.

Together with 47870189, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 47870191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47870131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23935095 + 23935096.

It is an arithmetic number, because the mean of its divisors is an integer number (23935096).

Almost surely, 2^47870191 is an apocalyptic number.

47870191 is a deficient number, since it is larger than the sum of its proper divisors (1).

47870191 is an equidigital number, since it uses as much as digits as its factorization.

47870191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 47870191 is about 6918.8287303560. The cubic root of 47870191 is about 363.0962136217.

The spelling of 47870191 in words is "forty-seven million, eight hundred seventy thousand, one hundred ninety-one".