6999431 has 2 divisors, whose sum is σ = 6999432. Its totient is φ = 6999430.

The previous prime is 6999413. The next prime is 6999449. The reversal of 6999431 is 1349996.

Together with previous prime (6999413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (6999413) and next prime (6999449).

It is a cyclic number.

It is not a de Polignac number, because 6999431 - 2⁶ = 6999367 is a prime.

It is a super-2 number, since 2×6999431² = 97984068647522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6999481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3499715 + 3499716.

It is an arithmetic number, because the mean of its divisors is an integer number (3499716).

Almost surely, 2^6999431 is an apocalyptic number.

6999431 is a deficient number, since it is larger than the sum of its proper divisors (1).

6999431 is an equidigital number, since it uses as much as digits as its factorization.

6999431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 41.

The square root of 6999431 is about 2645.6437779867. The cubic root of 6999431 is about 191.2879350042.

The spelling of 6999431 in words is "six million, nine hundred ninety-nine thousand, four hundred thirty-one".