195804457 has 2 divisors, whose sum is σ = 195804458. Its totient is φ = 195804456.

The previous prime is 195804437. The next prime is 195804467. The reversal of 195804457 is 754408591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119486761 + 76317696 = 10931^2 + 8736^2 .

It is a cyclic number.

It is not a de Polignac number, because 195804457 - 2²³ = 187415849 is a prime.

It is not a weakly prime, because it can be changed into another prime (195804437) 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, 97902228 + 97902229.

It is an arithmetic number, because the mean of its divisors is an integer number (97902229).

Almost surely, 2^195804457 is an apocalyptic number.

It is an amenable number.

195804457 is a deficient number, since it is larger than the sum of its proper divisors (1).

195804457 is an equidigital number, since it uses as much as digits as its factorization.

195804457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 195804457 is about 13993.0145787103. The cubic root of 195804457 is about 580.6853343533.

The spelling of 195804457 in words is "one hundred ninety-five million, eight hundred four thousand, four hundred fifty-seven".