680000029 has 2 divisors, whose sum is σ = 680000030. Its totient is φ = 680000028.

The previous prime is 680000021. The next prime is 680000059. The reversal of 680000029 is 920000086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 650352004 + 29648025 = 25502^2 + 5445^2 .

It is a cyclic number.

It is not a de Polignac number, because 680000029 - 2³ = 680000021 is a prime.

It is equal to p_35270170 and since 680000029 and 35270170 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 679999958 and 680000012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680000021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340000014 + 340000015.

It is an arithmetic number, because the mean of its divisors is an integer number (340000015).

Almost surely, 2^680000029 is an apocalyptic number.

It is an amenable number.

680000029 is a deficient number, since it is larger than the sum of its proper divisors (1).

680000029 is an equidigital number, since it uses as much as digits as its factorization.

680000029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 680000029 is about 26076.8101768602. The cubic root of 680000029 is about 879.3659469324.

The spelling of 680000029 in words is "six hundred eighty million, twenty-nine", and thus it is an aban number.