3439991 has 4 divisors (see below), whose sum is σ = 3448584. Its totient is φ = 3431400.

The previous prime is 3439987. The next prime is 3439999. The reversal of 3439991 is 1999343.

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

It is a cyclic number.

It is not a de Polignac number, because 3439991 - 2² = 3439987 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 (3439999) 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, 3665 + ... + 4506.

It is an arithmetic number, because the mean of its divisors is an integer number (862146).

Almost surely, 2^3439991 is an apocalyptic number.

3439991 is a deficient number, since it is larger than the sum of its proper divisors (8593).

3439991 is an equidigital number, since it uses as much as digits as its factorization.

3439991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8592.

The product of its digits is 26244, while the sum is 38.

The square root of 3439991 is about 1854.7212728602. The cubic root of 3439991 is about 150.9567146372.

The spelling of 3439991 in words is "three million, four hundred thirty-nine thousand, nine hundred ninety-one".