3731 has 8 divisors (see below), whose sum is σ = 4704. Its totient is φ = 2880.

The previous prime is 3727. The next prime is 3733. The reversal of 3731 is 1373.

3731 = 20² + 21² + ... + 26².

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 3731 - 2² = 3727 is a prime.

It is a super-2 number, since 2×3731² = 27840722, which contains 22 as substring.

It is a plaindrome in base 15.

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 3731.

It is not an unprimeable number, because it can be changed into a prime (3733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71 + ... + 111.

It is an arithmetic number, because the mean of its divisors is an integer number (588).

2³⁷³¹ is an apocalyptic number.

3731 is a deficient number, since it is larger than the sum of its proper divisors (973).

3731 is a wasteful number, since it uses less digits than its factorization.

3731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61.

The product of its digits is 63, while the sum is 14.

The square root of 3731 is about 61.0819122163. The cubic root of 3731 is about 15.5098792378.

The spelling of 3731 in words is "three thousand, seven hundred thirty-one".