195667613 has 2 divisors, whose sum is σ = 195667614. Its totient is φ = 195667612.

The previous prime is 195667607. The next prime is 195667639. The reversal of 195667613 is 316766591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194965369 + 702244 = 13963^2 + 838^2 .

It is a cyclic number.

It is not a de Polignac number, because 195667613 - 2⁸ = 195667357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195667513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97833806 + 97833807.

It is an arithmetic number, because the mean of its divisors is an integer number (97833807).

Almost surely, 2^195667613 is an apocalyptic number.

It is an amenable number.

195667613 is a deficient number, since it is larger than the sum of its proper divisors (1).

195667613 is an equidigital number, since it uses as much as digits as its factorization.

195667613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 44.

The square root of 195667613 is about 13988.1239985925. The cubic root of 195667613 is about 580.5500261925.

The spelling of 195667613 in words is "one hundred ninety-five million, six hundred sixty-seven thousand, six hundred thirteen".