191419117 has 2 divisors, whose sum is σ = 191419118. Its totient is φ = 191419116.

The previous prime is 191419061. The next prime is 191419127. The reversal of 191419117 is 711914191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110796676 + 80622441 = 10526^2 + 8979^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191419117 is a prime.

It is equal to p_10629736 and since 191419117 and 10629736 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191419127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95709558 + 95709559.

It is an arithmetic number, because the mean of its divisors is an integer number (95709559).

Almost surely, 2^191419117 is an apocalyptic number.

It is an amenable number.

191419117 is a deficient number, since it is larger than the sum of its proper divisors (1).

191419117 is an equidigital number, since it uses as much as digits as its factorization.

191419117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 34.

The square root of 191419117 is about 13835.4297728694. The cubic root of 191419117 is about 576.3174499559.

The spelling of 191419117 in words is "one hundred ninety-one million, four hundred nineteen thousand, one hundred seventeen".