3967231 has 2 divisors, whose sum is σ = 3967232. Its totient is φ = 3967230.

The previous prime is 3967207. The next prime is 3967237. The reversal of 3967231 is 1327693.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3967231 - 2⁹ = 3966719 is a prime.

It is a super-2 number, since 2×3967231² = 31477843614722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3967193 and 3967202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3967237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1983615 + 1983616.

It is an arithmetic number, because the mean of its divisors is an integer number (1983616).

Almost surely, 2^3967231 is an apocalyptic number.

3967231 is a deficient number, since it is larger than the sum of its proper divisors (1).

3967231 is an equidigital number, since it uses as much as digits as its factorization.

3967231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 31.

The square root of 3967231 is about 1991.7909026803. The cubic root of 3967231 is about 158.3054365133.

The spelling of 3967231 in words is "three million, nine hundred sixty-seven thousand, two hundred thirty-one".