195731329 has 2 divisors, whose sum is σ = 195731330. Its totient is φ = 195731328.

The previous prime is 195731299. The next prime is 195731339. The reversal of 195731329 is 923137591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103571329 + 92160000 = 10177^2 + 9600^2 .

It is a cyclic number.

It is not a de Polignac number, because 195731329 - 2⁵ = 195731297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 195731291 and 195731300.

It is not a weakly prime, because it can be changed into another prime (195731339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97865664 + 97865665.

It is an arithmetic number, because the mean of its divisors is an integer number (97865665).

Almost surely, 2^195731329 is an apocalyptic number.

It is an amenable number.

195731329 is a deficient number, since it is larger than the sum of its proper divisors (1).

195731329 is an equidigital number, since it uses as much as digits as its factorization.

195731329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51030, while the sum is 40.

The square root of 195731329 is about 13990.4013166170. The cubic root of 195731329 is about 580.6130349356.

It can be divided in two parts, 19573 and 1329, that added together give a palindrome (20902).

The spelling of 195731329 in words is "one hundred ninety-five million, seven hundred thirty-one thousand, three hundred twenty-nine".