195982859 has 2 divisors, whose sum is σ = 195982860. Its totient is φ = 195982858.

The previous prime is 195982847. The next prime is 195982861. The reversal of 195982859 is 958289591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195982859 - 2¹² = 195978763 is a prime.

Together with 195982861, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (195982819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97991429 + 97991430.

It is an arithmetic number, because the mean of its divisors is an integer number (97991430).

Almost surely, 2^195982859 is an apocalyptic number.

195982859 is a deficient number, since it is larger than the sum of its proper divisors (1).

195982859 is an equidigital number, since it uses as much as digits as its factorization.

195982859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2332800, while the sum is 56.

The square root of 195982859 is about 13999.3878080436. The cubic root of 195982859 is about 580.8616394620.

The spelling of 195982859 in words is "one hundred ninety-five million, nine hundred eighty-two thousand, eight hundred fifty-nine".