195400817 has 2 divisors, whose sum is σ = 195400818. Its totient is φ = 195400816.

The previous prime is 195400813. The next prime is 195400819. The reversal of 195400817 is 718004591.

195400817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151191616 + 44209201 = 12296^2 + 6649^2 .

It is a cyclic number.

It is not a de Polignac number, because 195400817 - 2² = 195400813 is a prime.

Together with 195400819, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (195400813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97700408 + 97700409.

It is an arithmetic number, because the mean of its divisors is an integer number (97700409).

Almost surely, 2^195400817 is an apocalyptic number.

It is an amenable number.

195400817 is a deficient number, since it is larger than the sum of its proper divisors (1).

195400817 is an equidigital number, since it uses as much as digits as its factorization.

195400817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 195400817 is about 13978.5842273100. The cubic root of 195400817 is about 580.2860430130.

The spelling of 195400817 in words is "one hundred ninety-five million, four hundred thousand, eight hundred seventeen".