191614957 has 2 divisors, whose sum is σ = 191614958. Its totient is φ = 191614956.

The previous prime is 191614931. The next prime is 191614961. The reversal of 191614957 is 759416191.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135349956 + 56265001 = 11634^2 + 7501^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191614957 is a prime.

It is a super-2 number, since 2×191614957² = 73432583492223698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191614987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95807478 + 95807479.

It is an arithmetic number, because the mean of its divisors is an integer number (95807479).

Almost surely, 2^191614957 is an apocalyptic number.

It is an amenable number.

191614957 is a deficient number, since it is larger than the sum of its proper divisors (1).

191614957 is an equidigital number, since it uses as much as digits as its factorization.

191614957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 43.

The square root of 191614957 is about 13842.5054451859. The cubic root of 191614957 is about 576.5139255259.

The spelling of 191614957 in words is "one hundred ninety-one million, six hundred fourteen thousand, nine hundred fifty-seven".