195473561 has 2 divisors, whose sum is σ = 195473562. Its totient is φ = 195473560.

The previous prime is 195473533. The next prime is 195473563. The reversal of 195473561 is 165374591.

195473561 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., 152374336 + 43099225 = 12344^2 + 6565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195473561 is a prime.

Together with 195473563, 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 (195473563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97736780 + 97736781.

It is an arithmetic number, because the mean of its divisors is an integer number (97736781).

Almost surely, 2^195473561 is an apocalyptic number.

It is an amenable number.

195473561 is a deficient number, since it is larger than the sum of its proper divisors (1).

195473561 is an equidigital number, since it uses as much as digits as its factorization.

195473561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 41.

The square root of 195473561 is about 13981.1859654323. The cubic root of 195473561 is about 580.3580438903.

The spelling of 195473561 in words is "one hundred ninety-five million, four hundred seventy-three thousand, five hundred sixty-one".