3437981 has 4 divisors (see below), whose sum is σ = 3476700. Its totient is φ = 3399264.

The previous prime is 3437963. The next prime is 3438007. The reversal of 3437981 is 1897343.

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

It can be written as a sum of positive squares in 2 ways, for example, as 319225 + 3118756 = 565^2 + 1766^2 .

It is a cyclic number.

It is not a de Polignac number, because 3437981 - 2¹⁰ = 3436957 is a prime.

It is a super-2 number, since 2×3437981² = 23639426712722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3437911) 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, 19226 + ... + 19403.

It is an arithmetic number, because the mean of its divisors is an integer number (869175).

Almost surely, 2^3437981 is an apocalyptic number.

It is an amenable number.

3437981 is a deficient number, since it is larger than the sum of its proper divisors (38719).

3437981 is an equidigital number, since it uses as much as digits as its factorization.

3437981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38718.

The product of its digits is 18144, while the sum is 35.

The square root of 3437981 is about 1854.1793332901. The cubic root of 3437981 is about 150.9273073788.

The spelling of 3437981 in words is "three million, four hundred thirty-seven thousand, nine hundred eighty-one".