68164489 has 2 divisors, whose sum is σ = 68164490. Its totient is φ = 68164488.

The previous prime is 68164469. The next prime is 68164501. The reversal of 68164489 is 98446186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54878464 + 13286025 = 7408^2 + 3645^2 .

It is a cyclic number.

It is not a de Polignac number, because 68164489 - 2⁷ = 68164361 is a prime.

It is a super-2 number, since 2×68164489² = 9292795121262242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68164469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34082244 + 34082245.

It is an arithmetic number, because the mean of its divisors is an integer number (34082245).

Almost surely, 2^68164489 is an apocalyptic number.

It is an amenable number.

68164489 is a deficient number, since it is larger than the sum of its proper divisors (1).

68164489 is an equidigital number, since it uses as much as digits as its factorization.

68164489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 46.

The square root of 68164489 is about 8256.1788376948. The cubic root of 68164489 is about 408.4943566330.

The spelling of 68164489 in words is "sixty-eight million, one hundred sixty-four thousand, four hundred eighty-nine".