3197640847 has 2 divisors, whose sum is σ = 3197640848. Its totient is φ = 3197640846.

The previous prime is 3197640839. The next prime is 3197640883. The reversal of 3197640847 is 7480467913.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3197640847 - 2³ = 3197640839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3197640847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3197640547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1598820423 + 1598820424.

It is an arithmetic number, because the mean of its divisors is an integer number (1598820424).

Almost surely, 2^3197640847 is an apocalyptic number.

3197640847 is a deficient number, since it is larger than the sum of its proper divisors (1).

3197640847 is an equidigital number, since it uses as much as digits as its factorization.

3197640847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The square root of 3197640847 is about 56547.6864867167. The cubic root of 3197640847 is about 1473.2503773455.

The spelling of 3197640847 in words is "three billion, one hundred ninety-seven million, six hundred forty thousand, eight hundred forty-seven".