195840013 has 2 divisors, whose sum is σ = 195840014. Its totient is φ = 195840012.

The previous prime is 195839999. The next prime is 195840037. The reversal of 195840013 is 310048591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154082569 + 41757444 = 12413^2 + 6462^2 .

It is an emirp because it is prime and its reverse (310048591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195840013 - 2⁵ = 195839981 is a prime.

It is a super-3 number, since 3×195840013³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195840713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97920006 + 97920007.

It is an arithmetic number, because the mean of its divisors is an integer number (97920007).

Almost surely, 2^195840013 is an apocalyptic number.

It is an amenable number.

195840013 is a deficient number, since it is larger than the sum of its proper divisors (1).

195840013 is an equidigital number, since it uses as much as digits as its factorization.

195840013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 195840013 is about 13994.2850121040. The cubic root of 195840013 is about 580.7204809794.

The spelling of 195840013 in words is "one hundred ninety-five million, eight hundred forty thousand, thirteen".