3737981 has 4 divisors (see below), whose sum is σ = 4025532. Its totient is φ = 3450432.

The previous prime is 3737969. The next prime is 3737989. The reversal of 3737981 is 1897373.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1897373 = 67 ⋅28319.

It can be written as a sum of positive squares in 2 ways, for example, as 241081 + 3496900 = 491^2 + 1870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3737981 is a prime.

It is a super-2 number, since 2×3737981² = 27945003912722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3737989) 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, 143756 + ... + 143781.

It is an arithmetic number, because the mean of its divisors is an integer number (1006383).

Almost surely, 2^3737981 is an apocalyptic number.

It is an amenable number.

3737981 is a deficient number, since it is larger than the sum of its proper divisors (287551).

3737981 is a wasteful number, since it uses less digits than its factorization.

3737981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287550.

The product of its digits is 31752, while the sum is 38.

The square root of 3737981 is about 1933.3858900902. The cubic root of 3737981 is about 155.1954661986.

The spelling of 3737981 in words is "three million, seven hundred thirty-seven thousand, nine hundred eighty-one".