68558993 has 2 divisors, whose sum is σ = 68558994. Its totient is φ = 68558992.

The previous prime is 68558989. The next prime is 68559013. The reversal of 68558993 is 39985586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62837329 + 5721664 = 7927^2 + 2392^2 .

It is a cyclic number.

It is not a de Polignac number, because 68558993 - 2² = 68558989 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68558953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34279496 + 34279497.

It is an arithmetic number, because the mean of its divisors is an integer number (34279497).

Almost surely, 2^68558993 is an apocalyptic number.

It is an amenable number.

68558993 is a deficient number, since it is larger than the sum of its proper divisors (1).

68558993 is an equidigital number, since it uses as much as digits as its factorization.

68558993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2332800, while the sum is 53.

The square root of 68558993 is about 8280.0358091013. The cubic root of 68558993 is about 409.2808989313.

The spelling of 68558993 in words is "sixty-eight million, five hundred fifty-eight thousand, nine hundred ninety-three".