191652961 has 2 divisors, whose sum is σ = 191652962. Its totient is φ = 191652960.

The previous prime is 191652953. The next prime is 191653009. The reversal of 191652961 is 169256191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187827025 + 3825936 = 13705^2 + 1956^2 .

It is a cyclic number.

It is not a de Polignac number, because 191652961 - 2³ = 191652953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (191652061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95826480 + 95826481.

It is an arithmetic number, because the mean of its divisors is an integer number (95826481).

Almost surely, 2^191652961 is an apocalyptic number.

It is an amenable number.

191652961 is a deficient number, since it is larger than the sum of its proper divisors (1).

191652961 is an equidigital number, since it uses as much as digits as its factorization.

191652961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 40.

The square root of 191652961 is about 13843.8781055021. The cubic root of 191652961 is about 576.5520373505.

The spelling of 191652961 in words is "one hundred ninety-one million, six hundred fifty-two thousand, nine hundred sixty-one".