3438991 has 4 divisors (see below), whose sum is σ = 3443112. Its totient is φ = 3434872.

The previous prime is 3438979. The next prime is 3439001. The reversal of 3438991 is 1998343.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3438991 - 2¹⁵ = 3406223 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 3438991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3438901) 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 3 ways as a sum of consecutive naturals, for example, 316 + ... + 2641.

It is an arithmetic number, because the mean of its divisors is an integer number (860778).

Almost surely, 2^3438991 is an apocalyptic number.

3438991 is a deficient number, since it is larger than the sum of its proper divisors (4121).

3438991 is a wasteful number, since it uses less digits than its factorization.

3438991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4120.

The product of its digits is 23328, while the sum is 37.

The square root of 3438991 is about 1854.4516709799. The cubic root of 3438991 is about 150.9420855927.

The spelling of 3438991 in words is "three million, four hundred thirty-eight thousand, nine hundred ninety-one".