6878645429 has 2 divisors, whose sum is σ = 6878645430. Its totient is φ = 6878645428.

The previous prime is 6878645407. The next prime is 6878645447. The reversal of 6878645429 is 9245468786.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4177036900 + 2701608529 = 64630^2 + 51977^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6878645429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6878645129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3439322714 + 3439322715.

It is an arithmetic number, because the mean of its divisors is an integer number (3439322715).

Almost surely, 2^6878645429 is an apocalyptic number.

It is an amenable number.

6878645429 is a deficient number, since it is larger than the sum of its proper divisors (1).

6878645429 is an equidigital number, since it uses as much as digits as its factorization.

6878645429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23224320, while the sum is 59.

The square root of 6878645429 is about 82937.5996095860. The cubic root of 6878645429 is about 1901.8122532554.

The spelling of 6878645429 in words is "six billion, eight hundred seventy-eight million, six hundred forty-five thousand, four hundred twenty-nine".