68172073 has 2 divisors, whose sum is σ = 68172074. Its totient is φ = 68172072.

The previous prime is 68172059. The next prime is 68172089. The reversal of 68172073 is 37027186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56145049 + 12027024 = 7493^2 + 3468^2 .

It is a cyclic number.

It is not a de Polignac number, because 68172073 - 2²⁵ = 34617641 is a prime.

It is not a weakly prime, because it can be changed into another prime (68172173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34086036 + 34086037.

It is an arithmetic number, because the mean of its divisors is an integer number (34086037).

Almost surely, 2^68172073 is an apocalyptic number.

It is an amenable number.

68172073 is a deficient number, since it is larger than the sum of its proper divisors (1).

68172073 is an equidigital number, since it uses as much as digits as its factorization.

68172073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 68172073 is about 8256.6381172969. The cubic root of 68172073 is about 408.5095058031.

The spelling of 68172073 in words is "sixty-eight million, one hundred seventy-two thousand, seventy-three".