6406831 has 2 divisors, whose sum is σ = 6406832. Its totient is φ = 6406830.

The previous prime is 6406823. The next prime is 6406847. The reversal of 6406831 is 1386046.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6406831 - 2³ = 6406823 is a prime.

It is a super-2 number, since 2×6406831² = 82094966925122, which contains 22 as substring.

It is a Chen prime.

It is equal to p₄₃₈₈₄₁ and since 6406831 and 438841 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6406831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6406861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3203415 + 3203416.

It is an arithmetic number, because the mean of its divisors is an integer number (3203416).

Almost surely, 2^6406831 is an apocalyptic number.

6406831 is a deficient number, since it is larger than the sum of its proper divisors (1).

6406831 is an equidigital number, since it uses as much as digits as its factorization.

6406831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 6406831 is about 2531.1718629915. The cubic root of 6406831 is about 185.7295854682.

The spelling of 6406831 in words is "six million, four hundred six thousand, eight hundred thirty-one".