68705389 has 2 divisors, whose sum is σ = 68705390. Its totient is φ = 68705388.

The previous prime is 68705383. The next prime is 68705407. The reversal of 68705389 is 98350786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58782889 + 9922500 = 7667^2 + 3150^2 .

It is a cyclic number.

It is not a de Polignac number, because 68705389 - 2⁷ = 68705261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68705383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34352694 + 34352695.

It is an arithmetic number, because the mean of its divisors is an integer number (34352695).

Almost surely, 2^68705389 is an apocalyptic number.

It is an amenable number.

68705389 is a deficient number, since it is larger than the sum of its proper divisors (1).

68705389 is an equidigital number, since it uses as much as digits as its factorization.

68705389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 68705389 is about 8288.8713948281. The cubic root of 68705389 is about 409.5720082704.

The spelling of 68705389 in words is "sixty-eight million, seven hundred five thousand, three hundred eighty-nine".