68022909 has 20 divisors (see below), whose sum is σ = 104365404. Its totient is φ = 44121024.

The previous prime is 68022887. The next prime is 68022917. The reversal of 68022909 is 90922086.

It can be written as a sum of positive squares in 2 ways, for example, as 24502500 + 43520409 = 4950^2 + 6597^2 .

It is not a de Polignac number, because 68022909 - 2⁷ = 68022781 is a prime.

It is a super-2 number, since 2×68022909² = 9254232297644562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68022989) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8352 + ... + 14345.

Almost surely, 2^68022909 is an apocalyptic number.

It is an amenable number.

68022909 is a deficient number, since it is larger than the sum of its proper divisors (36342495).

68022909 is a wasteful number, since it uses less digits than its factorization.

68022909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22746 (or 22737 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 68022909 is about 8247.6001964208. The cubic root of 68022909 is about 408.2113416319.

The spelling of 68022909 in words is "sixty-eight million, twenty-two thousand, nine hundred nine".