49197191 has 2 divisors, whose sum is σ = 49197192. Its totient is φ = 49197190.

The previous prime is 49197157. The next prime is 49197241. The reversal of 49197191 is 19179194.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49197191 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 (49197101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24598595 + 24598596.

It is an arithmetic number, because the mean of its divisors is an integer number (24598596).

Almost surely, 2^49197191 is an apocalyptic number.

49197191 is a deficient number, since it is larger than the sum of its proper divisors (1).

49197191 is an equidigital number, since it uses as much as digits as its factorization.

49197191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 41.

The square root of 49197191 is about 7014.0709292108. The cubic root of 49197191 is about 366.4207862096.

The spelling of 49197191 in words is "forty-nine million, one hundred ninety-seven thousand, one hundred ninety-one".