68158417 has 2 divisors, whose sum is σ = 68158418. Its totient is φ = 68158416.

The previous prime is 68158399. The next prime is 68158427. The reversal of 68158417 is 71485186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38825361 + 29333056 = 6231^2 + 5416^2 .

It is a cyclic number.

It is not a de Polignac number, because 68158417 - 2¹⁵ = 68125649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68158417.

It is not a weakly prime, because it can be changed into another prime (68158427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34079208 + 34079209.

It is an arithmetic number, because the mean of its divisors is an integer number (34079209).

Almost surely, 2^68158417 is an apocalyptic number.

It is an amenable number.

68158417 is a deficient number, since it is larger than the sum of its proper divisors (1).

68158417 is an equidigital number, since it uses as much as digits as its factorization.

68158417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 40.

The square root of 68158417 is about 8255.8111049127. The cubic root of 68158417 is about 408.4822268989.

The spelling of 68158417 in words is "sixty-eight million, one hundred fifty-eight thousand, four hundred seventeen".