4437981 has 6 divisors (see below), whose sum is σ = 6410430. Its totient is φ = 2958648.

The previous prime is 4437977. The next prime is 4437989. The reversal of 4437981 is 1897344.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2277081 + 2160900 = 1509^2 + 1470^2 .

It is not a de Polignac number, because 4437981 - 2² = 4437977 is a prime.

It is a super-2 number, since 2×4437981² = 39391350712722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4437989) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 246546 + ... + 246563.

It is an arithmetic number, because the mean of its divisors is an integer number (1068405).

Almost surely, 2^4437981 is an apocalyptic number.

It is an amenable number.

4437981 is a deficient number, since it is larger than the sum of its proper divisors (1972449).

4437981 is a wasteful number, since it uses less digits than its factorization.

4437981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493115 (or 493112 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 4437981 is about 2106.6516085960. The cubic root of 4437981 is about 164.3343984980.

It can be divided in two parts, 44 and 37981, that added together give a square (38025 = 195²).

The spelling of 4437981 in words is "four million, four hundred thirty-seven thousand, nine hundred eighty-one".