3195991 has 4 divisors (see below), whose sum is σ = 3273984. Its totient is φ = 3118000.

The previous prime is 3195977. The next prime is 3196001. The reversal of 3195991 is 1995913.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3195991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3195991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3195911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38935 + ... + 39016.

It is an arithmetic number, because the mean of its divisors is an integer number (818496).

Almost surely, 2^3195991 is an apocalyptic number.

3195991 is a deficient number, since it is larger than the sum of its proper divisors (77993).

3195991 is an equidigital number, since it uses as much as digits as its factorization.

3195991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77992.

The product of its digits is 10935, while the sum is 37.

The square root of 3195991 is about 1787.7334812550. The cubic root of 3195991 is about 147.2996955527.

It can be divided in two parts, 319599 and 1, that added together give a triangular number (319600 = T₇₉₉).

The spelling of 3195991 in words is "three million, one hundred ninety-five thousand, nine hundred ninety-one".