22722709 has 2 divisors, whose sum is σ = 22722710. Its totient is φ = 22722708.

The previous prime is 22722703. The next prime is 22722719. The reversal of 22722709 is 90722722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17455684 + 5267025 = 4178^2 + 2295^2 .

It is a cyclic number.

It is not a de Polignac number, because 22722709 - 2³ = 22722701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22722701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11361354 + 11361355.

It is an arithmetic number, because the mean of its divisors is an integer number (11361355).

Almost surely, 2^22722709 is an apocalyptic number.

It is an amenable number.

22722709 is a deficient number, since it is larger than the sum of its proper divisors (1).

22722709 is an equidigital number, since it uses as much as digits as its factorization.

22722709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 22722709 is about 4766.8342744425. The cubic root of 22722709 is about 283.2392064111.

The spelling of 22722709 in words is "twenty-two million, seven hundred twenty-two thousand, seven hundred nine".