3973731 has 4 divisors (see below), whose sum is σ = 5298312. Its totient is φ = 2649152.

The previous prime is 3973729. The next prime is 3973741. The reversal of 3973731 is 1373793.

3973731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 3973731 - 2¹ = 3973729 is a prime.

It is a super-2 number, since 2×3973731² = 31581076120722, which contains 22 as substring.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 3973692 and 3973701.

It is not an unprimeable number, because it can be changed into a prime (3973741) 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 3 ways as a sum of consecutive naturals, for example, 662286 + ... + 662291.

It is an arithmetic number, because the mean of its divisors is an integer number (1324578).

Almost surely, 2^3973731 is an apocalyptic number.

3973731 is a deficient number, since it is larger than the sum of its proper divisors (1324581).

3973731 is a wasteful number, since it uses less digits than its factorization.

3973731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324580.

The product of its digits is 11907, while the sum is 33.

The square root of 3973731 is about 1993.4219322562. The cubic root of 3973731 is about 158.3918463944.

The spelling of 3973731 in words is "three million, nine hundred seventy-three thousand, seven hundred thirty-one".