195286409 has 2 divisors, whose sum is σ = 195286410. Its totient is φ = 195286408.

The previous prime is 195286373. The next prime is 195286411. The reversal of 195286409 is 904682591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106399225 + 88887184 = 10315^2 + 9428^2 .

It is a cyclic number.

It is not a de Polignac number, because 195286409 - 2⁸ = 195286153 is a prime.

Together with 195286411, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 195286409.

It is not a weakly prime, because it can be changed into another prime (195286439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97643204 + 97643205.

It is an arithmetic number, because the mean of its divisors is an integer number (97643205).

Almost surely, 2^195286409 is an apocalyptic number.

It is an amenable number.

195286409 is a deficient number, since it is larger than the sum of its proper divisors (1).

195286409 is an equidigital number, since it uses as much as digits as its factorization.

195286409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 195286409 is about 13974.4913682037. The cubic root of 195286409 is about 580.1727675963.

The spelling of 195286409 in words is "one hundred ninety-five million, two hundred eighty-six thousand, four hundred nine".