22705129 has 2 divisors, whose sum is σ = 22705130. Its totient is φ = 22705128.

The previous prime is 22705127. The next prime is 22705139. The reversal of 22705129 is 92150722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13542400 + 9162729 = 3680^2 + 3027^2 .

It is a cyclic number.

It is not a de Polignac number, because 22705129 - 2¹ = 22705127 is a prime.

Together with 22705127, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 22705097 and 22705106.

It is not a weakly prime, because it can be changed into another prime (22705127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11352564 + 11352565.

It is an arithmetic number, because the mean of its divisors is an integer number (11352565).

Almost surely, 2^22705129 is an apocalyptic number.

It is an amenable number.

22705129 is a deficient number, since it is larger than the sum of its proper divisors (1).

22705129 is an equidigital number, since it uses as much as digits as its factorization.

22705129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 22705129 is about 4764.9899265371. The cubic root of 22705129 is about 283.1661425006.

The spelling of 22705129 in words is "twenty-two million, seven hundred five thousand, one hundred twenty-nine".