68742029 has 2 divisors, whose sum is σ = 68742030. Its totient is φ = 68742028.

The previous prime is 68741969. The next prime is 68742031. The reversal of 68742029 is 92024786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66422500 + 2319529 = 8150^2 + 1523^2 .

It is a cyclic number.

It is not a de Polignac number, because 68742029 - 2⁸ = 68741773 is a prime.

Together with 68742031, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 68741983 and 68742001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68742829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34371014 + 34371015.

It is an arithmetic number, because the mean of its divisors is an integer number (34371015).

Almost surely, 2^68742029 is an apocalyptic number.

It is an amenable number.

68742029 is a deficient number, since it is larger than the sum of its proper divisors (1).

68742029 is an equidigital number, since it uses as much as digits as its factorization.

68742029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 68742029 is about 8291.0812925697. The cubic root of 68742029 is about 409.6448024221.

The spelling of 68742029 in words is "sixty-eight million, seven hundred forty-two thousand, twenty-nine".