3971223 has 6 divisors (see below), whose sum is σ = 5736224. Its totient is φ = 2647476.

The previous prime is 3971213. The next prime is 3971239. The reversal of 3971223 is 3221793.

It is not a de Polignac number, because 3971223 - 2⁴ = 3971207 is a prime.

It is a super-2 number, since 2×3971223² = 31541224231458, 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 (3971213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 220615 + ... + 220632.

Almost surely, 2^3971223 is an apocalyptic number.

3971223 is a deficient number, since it is larger than the sum of its proper divisors (1765001).

3971223 is a wasteful number, since it uses less digits than its factorization.

3971223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441253 (or 441250 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 3971223 is about 1992.7927639371. The cubic root of 3971223 is about 158.3585166468.

The spelling of 3971223 in words is "three million, nine hundred seventy-one thousand, two hundred twenty-three".