3731981 has 8 divisors (see below), whose sum is σ = 4212000. Its totient is φ = 3275440.

The previous prime is 3731969. The next prime is 3731983. The reversal of 3731981 is 1891373.

3731981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3731981 is a prime.

It is a super-2 number, since 2×3731981² = 27855364368722, 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 (3731983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5531 + ... + 6168.

It is an arithmetic number, because the mean of its divisors is an integer number (526500).

Almost surely, 2^3731981 is an apocalyptic number.

It is an amenable number.

3731981 is a deficient number, since it is larger than the sum of its proper divisors (480019).

3731981 is a wasteful number, since it uses less digits than its factorization.

3731981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11739.

The product of its digits is 4536, while the sum is 32.

The square root of 3731981 is about 1931.8335849653. The cubic root of 3731981 is about 155.1123846755.

The spelling of 3731981 in words is "three million, seven hundred thirty-one thousand, nine hundred eighty-one".