68138593 has 2 divisors, whose sum is σ = 68138594. Its totient is φ = 68138592.

The previous prime is 68138573. The next prime is 68138633. The reversal of 68138593 is 39583186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61105489 + 7033104 = 7817^2 + 2652^2 .

It is a cyclic number.

It is not a de Polignac number, because 68138593 - 2⁵ = 68138561 is a prime.

It is not a weakly prime, because it can be changed into another prime (68138573) 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, 34069296 + 34069297.

It is an arithmetic number, because the mean of its divisors is an integer number (34069297).

Almost surely, 2^68138593 is an apocalyptic number.

It is an amenable number.

68138593 is a deficient number, since it is larger than the sum of its proper divisors (1).

68138593 is an equidigital number, since it uses as much as digits as its factorization.

68138593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 68138593 is about 8254.6104087352. The cubic root of 68138593 is about 408.4426204583.

The spelling of 68138593 in words is "sixty-eight million, one hundred thirty-eight thousand, five hundred ninety-three".