195979339 has 2 divisors, whose sum is σ = 195979340. Its totient is φ = 195979338.

The previous prime is 195979321. The next prime is 195979369. The reversal of 195979339 is 933979591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 195979339 - 2⁵ = 195979307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 195979339.

It is not a weakly prime, because it can be changed into another prime (195979369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97989669 + 97989670.

It is an arithmetic number, because the mean of its divisors is an integer number (97989670).

Almost surely, 2^195979339 is an apocalyptic number.

195979339 is a deficient number, since it is larger than the sum of its proper divisors (1).

195979339 is an equidigital number, since it uses as much as digits as its factorization.

195979339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2066715, while the sum is 55.

The square root of 195979339 is about 13999.2620876959. The cubic root of 195979339 is about 580.8581618701.

The spelling of 195979339 in words is "one hundred ninety-five million, nine hundred seventy-nine thousand, three hundred thirty-nine".