195634091 has 2 divisors, whose sum is σ = 195634092. Its totient is φ = 195634090.

The previous prime is 195634081. The next prime is 195634093. The reversal of 195634091 is 190436591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195634091 - 2⁶ = 195634027 is a prime.

It is a super-3 number, since 3×195634091³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

Together with 195634093, it forms a pair of twin primes.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 195634091 parts by 19780 straight cuts.

It is not a weakly prime, because it can be changed into another prime (195634093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97817045 + 97817046.

It is an arithmetic number, because the mean of its divisors is an integer number (97817046).

Almost surely, 2^195634091 is an apocalyptic number.

195634091 is a deficient number, since it is larger than the sum of its proper divisors (1).

195634091 is an equidigital number, since it uses as much as digits as its factorization.

195634091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 195634091 is about 13986.9257165397. The cubic root of 195634091 is about 580.5168708001.

The spelling of 195634091 in words is "one hundred ninety-five million, six hundred thirty-four thousand, ninety-one".