195450791 has 2 divisors, whose sum is σ = 195450792. Its totient is φ = 195450790.

The previous prime is 195450733. The next prime is 195450793. The reversal of 195450791 is 197054591.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195450791 is a prime.

Together with 195450793, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195450793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97725395 + 97725396.

It is an arithmetic number, because the mean of its divisors is an integer number (97725396).

Almost surely, 2^195450791 is an apocalyptic number.

195450791 is a deficient number, since it is larger than the sum of its proper divisors (1).

195450791 is an equidigital number, since it uses as much as digits as its factorization.

195450791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56700, while the sum is 41.

The square root of 195450791 is about 13980.3716331148. The cubic root of 195450791 is about 580.3355084201.

The spelling of 195450791 in words is "one hundred ninety-five million, four hundred fifty thousand, seven hundred ninety-one".