195250019 has 2 divisors, whose sum is σ = 195250020. Its totient is φ = 195250018.

The previous prime is 195249983. The next prime is 195250031. The reversal of 195250019 is 910052591.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195250019 is a prime.

It is a super-3 number, since 3×195250019³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (195850019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97625009 + 97625010.

It is an arithmetic number, because the mean of its divisors is an integer number (97625010).

Almost surely, 2^195250019 is an apocalyptic number.

195250019 is a deficient number, since it is larger than the sum of its proper divisors (1).

195250019 is an equidigital number, since it uses as much as digits as its factorization.

195250019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4050, while the sum is 32.

The square root of 195250019 is about 13973.1892923556. The cubic root of 195250019 is about 580.1367285659.

The spelling of 195250019 in words is "one hundred ninety-five million, two hundred fifty thousand, nineteen".