3197991897 has 24 divisors (see below), whose sum is σ = 4867480800. Its totient is φ = 2017692288.

The previous prime is 3197991887. The next prime is 3197991943. The reversal of 3197991897 is 7981997913.

It is not a de Polignac number, because 3197991897 - 2⁶ = 3197991833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3197991887) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165073 + ... + 183425.

It is an arithmetic number, because the mean of its divisors is an integer number (202811700).

Almost surely, 2^3197991897 is an apocalyptic number.

It is an amenable number.

3197991897 is a deficient number, since it is larger than the sum of its proper divisors (1669488903).

3197991897 is a wasteful number, since it uses less digits than its factorization.

3197991897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19397 (or 19394 counting only the distinct ones).

The product of its digits is 7715736, while the sum is 63.

The square root of 3197991897 is about 56550.7904188792. The cubic root of 3197991897 is about 1473.3042885095.

The spelling of 3197991897 in words is "three billion, one hundred ninety-seven million, nine hundred ninety-one thousand, eight hundred ninety-seven".