68782169 has 2 divisors, whose sum is σ = 68782170. Its totient is φ = 68782168.

The previous prime is 68782157. The next prime is 68782193. The reversal of 68782169 is 96128786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46076944 + 22705225 = 6788^2 + 4765^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68782169 is a prime.

It is a super-2 number, since 2×68782169² = 9461973544689122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68782139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34391084 + 34391085.

It is an arithmetic number, because the mean of its divisors is an integer number (34391085).

Almost surely, 2^68782169 is an apocalyptic number.

It is an amenable number.

68782169 is a deficient number, since it is larger than the sum of its proper divisors (1).

68782169 is an equidigital number, since it uses as much as digits as its factorization.

68782169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 47.

The square root of 68782169 is about 8293.5016127086. The cubic root of 68782169 is about 409.7245204788.

The spelling of 68782169 in words is "sixty-eight million, seven hundred eighty-two thousand, one hundred sixty-nine".