6887429 has 2 divisors, whose sum is σ = 6887430. Its totient is φ = 6887428.

The previous prime is 6887417. The next prime is 6887437. The reversal of 6887429 is 9247886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5452225 + 1435204 = 2335^2 + 1198^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6887429 is a prime.

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 6887429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6887479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3443714 + 3443715.

It is an arithmetic number, because the mean of its divisors is an integer number (3443715).

Almost surely, 2^6887429 is an apocalyptic number.

It is an amenable number.

6887429 is a deficient number, since it is larger than the sum of its proper divisors (1).

6887429 is an equidigital number, since it uses as much as digits as its factorization.

6887429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 44.

The square root of 6887429 is about 2624.3911674901. The cubic root of 6887429 is about 190.2621404704.

The spelling of 6887429 in words is "six million, eight hundred eighty-seven thousand, four hundred twenty-nine".