6890069729 has 2 divisors, whose sum is σ = 6890069730. Its totient is φ = 6890069728.

The previous prime is 6890069717. The next prime is 6890069779. The reversal of 6890069729 is 9279600986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6103828129 + 786241600 = 78127^2 + 28040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6890069729 is a prime.

It is not a weakly prime, because it can be changed into another prime (6890069779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3445034864 + 3445034865.

It is an arithmetic number, because the mean of its divisors is an integer number (3445034865).

Almost surely, 2^6890069729 is an apocalyptic number.

It is an amenable number.

6890069729 is a deficient number, since it is larger than the sum of its proper divisors (1).

6890069729 is an equidigital number, since it uses as much as digits as its factorization.

6890069729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 56.

The square root of 6890069729 is about 83006.4439004587. The cubic root of 6890069729 is about 1902.8645368180.

The spelling of 6890069729 in words is "six billion, eight hundred ninety million, sixty-nine thousand, seven hundred twenty-nine".