6931429 has 2 divisors, whose sum is σ = 6931430. Its totient is φ = 6931428.

The previous prime is 6931411. The next prime is 6931439. The reversal of 6931429 is 9241396.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6890625 + 40804 = 2625^2 + 202^2 .

It is a cyclic number.

It is not a de Polignac number, because 6931429 - 2¹¹ = 6929381 is a prime.

6931429 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6931394 and 6931403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6931439) 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, 3465714 + 3465715.

It is an arithmetic number, because the mean of its divisors is an integer number (3465715).

Almost surely, 2^6931429 is an apocalyptic number.

It is an amenable number.

6931429 is a deficient number, since it is larger than the sum of its proper divisors (1).

6931429 is an equidigital number, since it uses as much as digits as its factorization.

6931429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 34.

The square root of 6931429 is about 2632.7607183335. The cubic root of 6931429 is about 190.6664408336. Note that the first 3 decimals are identical.

The spelling of 6931429 in words is "six million, nine hundred thirty-one thousand, four hundred twenty-nine".