195251269 has 2 divisors, whose sum is σ = 195251270. Its totient is φ = 195251268.

The previous prime is 195251263. The next prime is 195251291. The reversal of 195251269 is 962152591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192848769 + 2402500 = 13887^2 + 1550^2 .

It is an emirp because it is prime and its reverse (962152591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195251269 - 2⁷ = 195251141 is a prime.

It is a super-2 number, since 2×195251269² = 76246116092220722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195251263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97625634 + 97625635.

It is an arithmetic number, because the mean of its divisors is an integer number (97625635).

Almost surely, 2^195251269 is an apocalyptic number.

It is an amenable number.

195251269 is a deficient number, since it is larger than the sum of its proper divisors (1).

195251269 is an equidigital number, since it uses as much as digits as its factorization.

195251269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 40.

The square root of 195251269 is about 13973.2340207985. The cubic root of 195251269 is about 580.1379665843.

The spelling of 195251269 in words is "one hundred ninety-five million, two hundred fifty-one thousand, two hundred sixty-nine".