68030639 has 2 divisors, whose sum is σ = 68030640. Its totient is φ = 68030638.

The previous prime is 68030629. The next prime is 68030663. The reversal of 68030639 is 93603086.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68030639 - 2²⁰ = 66982063 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 68030599 and 68030608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68030609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34015319 + 34015320.

It is an arithmetic number, because the mean of its divisors is an integer number (34015320).

Almost surely, 2^68030639 is an apocalyptic number.

68030639 is a deficient number, since it is larger than the sum of its proper divisors (1).

68030639 is an equidigital number, since it uses as much as digits as its factorization.

68030639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 68030639 is about 8248.0688042717. The cubic root of 68030639 is about 408.2268038451.

The spelling of 68030639 in words is "sixty-eight million, thirty thousand, six hundred thirty-nine".