68193889 has 2 divisors, whose sum is σ = 68193890. Its totient is φ = 68193888.

The previous prime is 68193883. The next prime is 68193901. The reversal of 68193889 is 98839186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59830225 + 8363664 = 7735^2 + 2892^2 .

It is a cyclic number.

It is not a de Polignac number, because 68193889 - 2¹¹ = 68191841 is a prime.

It is not a weakly prime, because it can be changed into another prime (68193883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34096944 + 34096945.

It is an arithmetic number, because the mean of its divisors is an integer number (34096945).

Almost surely, 2^68193889 is an apocalyptic number.

It is an amenable number.

68193889 is a deficient number, since it is larger than the sum of its proper divisors (1).

68193889 is an equidigital number, since it uses as much as digits as its factorization.

68193889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 52.

The square root of 68193889 is about 8257.9591304389. The cubic root of 68193889 is about 408.5530773738.

The spelling of 68193889 in words is "sixty-eight million, one hundred ninety-three thousand, eight hundred eighty-nine".