22678109 has 2 divisors, whose sum is σ = 22678110. Its totient is φ = 22678108.

The previous prime is 22678091. The next prime is 22678121. The reversal of 22678109 is 90187622.

It is a happy number.

Together with previous prime (22678091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15132100 + 7546009 = 3890^2 + 2747^2 .

It is a cyclic number.

It is not a de Polignac number, because 22678109 - 2¹² = 22674013 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22678169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11339054 + 11339055.

It is an arithmetic number, because the mean of its divisors is an integer number (11339055).

Almost surely, 2^22678109 is an apocalyptic number.

It is an amenable number.

22678109 is a deficient number, since it is larger than the sum of its proper divisors (1).

22678109 is an equidigital number, since it uses as much as digits as its factorization.

22678109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 22678109 is about 4762.1538194393. The cubic root of 22678109 is about 283.0537716168.

The spelling of 22678109 in words is "twenty-two million, six hundred seventy-eight thousand, one hundred nine".