3197640839 has 2 divisors, whose sum is σ = 3197640840. Its totient is φ = 3197640838.

The previous prime is 3197640811. The next prime is 3197640847. The reversal of 3197640839 is 9380467913.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3197640839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3197640139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1598820419 + 1598820420.

It is an arithmetic number, because the mean of its divisors is an integer number (1598820420).

Almost surely, 2^3197640839 is an apocalyptic number.

3197640839 is a deficient number, since it is larger than the sum of its proper divisors (1).

3197640839 is an equidigital number, since it uses as much as digits as its factorization.

3197640839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 50.

The square root of 3197640839 is about 56547.6864159799. The cubic root of 3197640839 is about 1473.2503761169.

The spelling of 3197640839 in words is "three billion, one hundred ninety-seven million, six hundred forty thousand, eight hundred thirty-nine".