3971723 has 4 divisors (see below), whose sum is σ = 4539120. Its totient is φ = 3404328.

The previous prime is 3971719. The next prime is 3971731. The reversal of 3971723 is 3271793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3271793 = 7 ⋅467399.

It is a cyclic number.

It is not a de Polignac number, because 3971723 - 2² = 3971719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3971723.

It is not an unprimeable number, because it can be changed into a prime (3971713) 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, 283688 + ... + 283701.

It is an arithmetic number, because the mean of its divisors is an integer number (1134780).

Almost surely, 2^3971723 is an apocalyptic number.

3971723 is a deficient number, since it is larger than the sum of its proper divisors (567397).

3971723 is an equidigital number, since it uses as much as digits as its factorization.

3971723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567396.

The product of its digits is 7938, while the sum is 32.

The square root of 3971723 is about 1992.9182120699. The cubic root of 3971723 is about 158.3651624530.

The spelling of 3971723 in words is "three million, nine hundred seventy-one thousand, seven hundred twenty-three".