195459239 has 2 divisors, whose sum is σ = 195459240. Its totient is φ = 195459238.

The previous prime is 195459227. The next prime is 195459241. The reversal of 195459239 is 932954591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195459239 - 2⁸ = 195458983 is a prime.

It is a super-2 number, since 2×195459239² = 76408628220918242, which contains 22 as substring.

Together with 195459241, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 195459193 and 195459202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195458239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97729619 + 97729620.

It is an arithmetic number, because the mean of its divisors is an integer number (97729620).

Almost surely, 2^195459239 is an apocalyptic number.

195459239 is a deficient number, since it is larger than the sum of its proper divisors (1).

195459239 is an equidigital number, since it uses as much as digits as its factorization.

195459239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 437400, while the sum is 47.

The square root of 195459239 is about 13980.6737677410. The cubic root of 195459239 is about 580.3438696103.

The spelling of 195459239 in words is "one hundred ninety-five million, four hundred fifty-nine thousand, two hundred thirty-nine".