195940489 has 2 divisors, whose sum is σ = 195940490. Its totient is φ = 195940488.

The previous prime is 195940447. The next prime is 195940543. The reversal of 195940489 is 984049591.

It is a happy number.

195940489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154878025 + 41062464 = 12445^2 + 6408^2 .

It is a cyclic number.

It is not a de Polignac number, because 195940489 - 2²⁷ = 61722761 is a prime.

It is not a weakly prime, because it can be changed into another prime (195940439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97970244 + 97970245.

It is an arithmetic number, because the mean of its divisors is an integer number (97970245).

Almost surely, 2^195940489 is an apocalyptic number.

It is an amenable number.

195940489 is a deficient number, since it is larger than the sum of its proper divisors (1).

195940489 is an equidigital number, since it uses as much as digits as its factorization.

195940489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 195940489 is about 13997.8744457864. The cubic root of 195940489 is about 580.8197771590.

The spelling of 195940489 in words is "one hundred ninety-five million, nine hundred forty thousand, four hundred eighty-nine".