3996431 has 2 divisors, whose sum is σ = 3996432. Its totient is φ = 3996430.

The previous prime is 3996413. The next prime is 3996439. The reversal of 3996431 is 1346993.

Together with previous prime (3996413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (1346993) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3996431 is a prime.

It is a super-2 number, since 2×3996431² = 31942921475522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3996391 and 3996400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3996439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1998215 + 1998216.

It is an arithmetic number, because the mean of its divisors is an integer number (1998216).

Almost surely, 2^3996431 is an apocalyptic number.

3996431 is a deficient number, since it is larger than the sum of its proper divisors (1).

3996431 is an equidigital number, since it uses as much as digits as its factorization.

3996431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 35.

The square root of 3996431 is about 1999.1075508836. The cubic root of 3996431 is about 158.6928791953.

The spelling of 3996431 in words is "three million, nine hundred ninety-six thousand, four hundred thirty-one".