195398069 has 2 divisors, whose sum is σ = 195398070. Its totient is φ = 195398068.

The previous prime is 195398039. The next prime is 195398081. The reversal of 195398069 is 960893591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195160900 + 237169 = 13970^2 + 487^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195398069 is a prime.

It is a super-2 number, since 2×195398069² = 76360810737857522, which contains 22 as substring.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195398039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97699034 + 97699035.

It is an arithmetic number, because the mean of its divisors is an integer number (97699035).

Almost surely, 2^195398069 is an apocalyptic number.

It is an amenable number.

195398069 is a deficient number, since it is larger than the sum of its proper divisors (1).

195398069 is an equidigital number, since it uses as much as digits as its factorization.

195398069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 524880, while the sum is 50.

The square root of 195398069 is about 13978.4859337483. The cubic root of 195398069 is about 580.2833227352.

The spelling of 195398069 in words is "one hundred ninety-five million, three hundred ninety-eight thousand, sixty-nine".