3906431 has 2 divisors, whose sum is σ = 3906432. Its totient is φ = 3906430.

The previous prime is 3906407. The next prime is 3906433. The reversal of 3906431 is 1346093.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3906431 - 2⁶ = 3906367 is a prime.

It is a super-2 number, since 2×3906431² = 30520406315522, which contains 22 as substring.

Together with 3906433, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3906431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3906433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1953215 + 1953216.

It is an arithmetic number, because the mean of its divisors is an integer number (1953216).

Almost surely, 2^3906431 is an apocalyptic number.

3906431 is a deficient number, since it is larger than the sum of its proper divisors (1).

3906431 is an equidigital number, since it uses as much as digits as its factorization.

3906431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 3906431 is about 1976.4693268553. The cubic root of 3906431 is about 157.4925636869.

The spelling of 3906431 in words is "three million, nine hundred six thousand, four hundred thirty-one".