195731339 has 2 divisors, whose sum is σ = 195731340. Its totient is φ = 195731338.

The previous prime is 195731329. The next prime is 195731351. The reversal of 195731339 is 933137591.

It is a weak prime.

It is an emirp because it is prime and its reverse (933137591) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195731339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 195731296 and 195731305.

It is not a weakly prime, because it can be changed into another prime (195731329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97865669 + 97865670.

It is an arithmetic number, because the mean of its divisors is an integer number (97865670).

Almost surely, 2^195731339 is an apocalyptic number.

195731339 is a deficient number, since it is larger than the sum of its proper divisors (1).

195731339 is an equidigital number, since it uses as much as digits as its factorization.

195731339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76545, while the sum is 41.

The square root of 195731339 is about 13990.4016740049. The cubic root of 195731339 is about 580.6130448235.

The spelling of 195731339 in words is "one hundred ninety-five million, seven hundred thirty-one thousand, three hundred thirty-nine".