196162591 has 2 divisors, whose sum is σ = 196162592. Its totient is φ = 196162590.

The previous prime is 196162559. The next prime is 196162633. The reversal of 196162591 is 195261691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 196162591 - 2⁵ = 196162559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196162501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98081295 + 98081296.

It is an arithmetic number, because the mean of its divisors is an integer number (98081296).

Almost surely, 2^196162591 is an apocalyptic number.

196162591 is a deficient number, since it is larger than the sum of its proper divisors (1).

196162591 is an equidigital number, since it uses as much as digits as its factorization.

196162591 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 196162591 is about 14005.8056176716. The cubic root of 196162591 is about 581.0391507790.

The spelling of 196162591 in words is "one hundred ninety-six million, one hundred sixty-two thousand, five hundred ninety-one".