68428169 has 2 divisors, whose sum is σ = 68428170. Its totient is φ = 68428168.

The previous prime is 68428123. The next prime is 68428181. The reversal of 68428169 is 96182486.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45050944 + 23377225 = 6712^2 + 4835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68428169 is a prime.

It is a super-2 number, since 2×68428169² = 9364828625385122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8428169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34214084 + 34214085.

It is an arithmetic number, because the mean of its divisors is an integer number (34214085).

Almost surely, 2^68428169 is an apocalyptic number.

It is an amenable number.

68428169 is a deficient number, since it is larger than the sum of its proper divisors (1).

68428169 is an equidigital number, since it uses as much as digits as its factorization.

68428169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 44.

The square root of 68428169 is about 8272.1320709960. The cubic root of 68428169 is about 409.0204037701.

The spelling of 68428169 in words is "sixty-eight million, four hundred twenty-eight thousand, one hundred sixty-nine".