195682639 has 2 divisors, whose sum is σ = 195682640. Its totient is φ = 195682638.

The previous prime is 195682607. The next prime is 195682657. The reversal of 195682639 is 936286591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195682639 - 2⁵ = 195682607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 195682592 and 195682601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195682939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97841319 + 97841320.

It is an arithmetic number, because the mean of its divisors is an integer number (97841320).

Almost surely, 2^195682639 is an apocalyptic number.

195682639 is a deficient number, since it is larger than the sum of its proper divisors (1).

195682639 is an equidigital number, since it uses as much as digits as its factorization.

195682639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 49.

The square root of 195682639 is about 13988.6610867517. The cubic root of 195682639 is about 580.5648866341.

The spelling of 195682639 in words is "one hundred ninety-five million, six hundred eighty-two thousand, six hundred thirty-nine".