3191661913 has 8 divisors (see below), whose sum is σ = 3516287616. Its totient is φ = 2872782000.

The previous prime is 3191661911. The next prime is 3191661929.

3191661913 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3191661913 - 2¹ = 3191661911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3191661911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1435281 + ... + 1437502.

It is an arithmetic number, because the mean of its divisors is an integer number (439535952).

Almost surely, 2^3191661913 is an apocalyptic number.

It is an amenable number.

3191661913 is a deficient number, since it is larger than the sum of its proper divisors (324625703).

3191661913 is a wasteful number, since it uses less digits than its factorization.

3191661913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2872895.

The product of its digits is 26244, while the sum is 40.

The square root of 3191661913 is about 56494.7954505546. The cubic root of 3191661913 is about 1472.3315788819.

The spelling of 3191661913 in words is "three billion, one hundred ninety-one million, six hundred sixty-one thousand, nine hundred thirteen".