3190991 has 4 divisors (see below), whose sum is σ = 3277272. Its totient is φ = 3104712.

The previous prime is 3190981. The next prime is 3191003. The reversal of 3190991 is 1990913.

3190991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1990913 = 31 ⋅64223.

It is a cyclic number.

It is not a de Polignac number, because 3190991 - 2¹⁴ = 3174607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3190961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43085 + ... + 43158.

It is an arithmetic number, because the mean of its divisors is an integer number (819318).

Almost surely, 2^3190991 is an apocalyptic number.

3190991 is a deficient number, since it is larger than the sum of its proper divisors (86281).

3190991 is an equidigital number, since it uses as much as digits as its factorization.

3190991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86280.

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 3190991 is about 1786.3345151455. The cubic root of 3190991 is about 147.2228406340. Note that the first 3 decimals are identical.

The spelling of 3190991 in words is "three million, one hundred ninety thousand, nine hundred ninety-one".