191795761 has 2 divisors, whose sum is σ = 191795762. Its totient is φ = 191795760.

The previous prime is 191795731. The next prime is 191795771. The reversal of 191795761 is 167597191.

191795761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152670736 + 39125025 = 12356^2 + 6255^2 .

It is a cyclic number.

It is not a de Polignac number, because 191795761 - 2¹¹ = 191793713 is a prime.

It is a super-2 number, since 2×191795761² = 73571227875138242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (191795701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95897880 + 95897881.

It is an arithmetic number, because the mean of its divisors is an integer number (95897881).

Almost surely, 2^191795761 is an apocalyptic number.

It is an amenable number.

191795761 is a deficient number, since it is larger than the sum of its proper divisors (1).

191795761 is an equidigital number, since it uses as much as digits as its factorization.

191795761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 119070, while the sum is 46.

The square root of 191795761 is about 13849.0346594988. The cubic root of 191795761 is about 576.6951974851.

The spelling of 191795761 in words is "one hundred ninety-one million, seven hundred ninety-five thousand, seven hundred sixty-one".