3431991 has 8 divisors (see below), whose sum is σ = 4775040. Its totient is φ = 2188472.

The previous prime is 3431963. The next prime is 3431993. The reversal of 3431991 is 1991343.

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

It is a cyclic number.

It is not a de Polignac number, because 3431991 - 2⁹ = 3431479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3431993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24801 + ... + 24938.

It is an arithmetic number, because the mean of its divisors is an integer number (596880).

Almost surely, 2^3431991 is an apocalyptic number.

3431991 is a deficient number, since it is larger than the sum of its proper divisors (1343049).

3431991 is a wasteful number, since it uses less digits than its factorization.

3431991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49765.

The product of its digits is 2916, while the sum is 30.

The square root of 3431991 is about 1852.5633592404. The cubic root of 3431991 is about 150.8396027905.

The spelling of 3431991 in words is "three million, four hundred thirty-one thousand, nine hundred ninety-one".