6988256729 has 2 divisors, whose sum is σ = 6988256730. Its totient is φ = 6988256728.

The previous prime is 6988256707. The next prime is 6988256741. The reversal of 6988256729 is 9276528896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6455801104 + 532455625 = 80348^2 + 23075^2 .

It is a cyclic number.

It is not a de Polignac number, because 6988256729 - 2²⁰ = 6987208153 is a prime.

It is a super-2 number, since 2×6988256729² = 97671464220827558882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6988256749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3494128364 + 3494128365.

It is an arithmetic number, because the mean of its divisors is an integer number (3494128365).

Almost surely, 2^6988256729 is an apocalyptic number.

It is an amenable number.

6988256729 is a deficient number, since it is larger than the sum of its proper divisors (1).

6988256729 is an equidigital number, since it uses as much as digits as its factorization.

6988256729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26127360, while the sum is 62.

The square root of 6988256729 is about 83595.7937279143. The cubic root of 6988256729 is about 1911.8608664396.

The spelling of 6988256729 in words is "six billion, nine hundred eighty-eight million, two hundred fifty-six thousand, seven hundred twenty-nine".