471897191 has 2 divisors, whose sum is σ = 471897192. Its totient is φ = 471897190.

The previous prime is 471897161. The next prime is 471897199. The reversal of 471897191 is 191798174.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-471897191 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (471897199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235948595 + 235948596.

It is an arithmetic number, because the mean of its divisors is an integer number (235948596).

Almost surely, 2^471897191 is an apocalyptic number.

471897191 is a deficient number, since it is larger than the sum of its proper divisors (1).

471897191 is an equidigital number, since it uses as much as digits as its factorization.

471897191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 47.

The square root of 471897191 is about 21723.1947696466. The cubic root of 471897191 is about 778.5427486928.

The spelling of 471897191 in words is "four hundred seventy-one million, eight hundred ninety-seven thousand, one hundred ninety-one".