68746789 has 2 divisors, whose sum is σ = 68746790. Its totient is φ = 68746788.

The previous prime is 68746787. The next prime is 68746823. The reversal of 68746789 is 98764786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37576900 + 31169889 = 6130^2 + 5583^2 .

It is a cyclic number.

It is not a de Polignac number, because 68746789 - 2¹ = 68746787 is a prime.

It is a super-2 number, since 2×68746789² = 9452241995621042, which contains 22 as substring.

Together with 68746787, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68746787) 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, 34373394 + 34373395.

It is an arithmetic number, because the mean of its divisors is an integer number (34373395).

Almost surely, 2^68746789 is an apocalyptic number.

It is an amenable number.

68746789 is a deficient number, since it is larger than the sum of its proper divisors (1).

68746789 is an equidigital number, since it uses as much as digits as its factorization.

68746789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4064256, while the sum is 55.

The square root of 68746789 is about 8291.3683430421. The cubic root of 68746789 is about 409.6542574056.

The spelling of 68746789 in words is "sixty-eight million, seven hundred forty-six thousand, seven hundred eighty-nine".