22689729 has 6 divisors (see below), whose sum is σ = 32774066. Its totient is φ = 15126480.

The previous prime is 22689727. The next prime is 22689731. The reversal of 22689729 is 92798622.

It is an interprime number because it is at equal distance from previous prime (22689727) and next prime (22689731).

It can be written as a sum of positive squares in only one way, i.e., 20793600 + 1896129 = 4560^2 + 1377^2 .

It is not a de Polignac number, because 22689729 - 2¹ = 22689727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22689721) 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 in 5 ways as a sum of consecutive naturals, for example, 1260532 + ... + 1260549.

Almost surely, 2^22689729 is an apocalyptic number.

It is an amenable number.

22689729 is a deficient number, since it is larger than the sum of its proper divisors (10084337).

22689729 is a wasteful number, since it uses less digits than its factorization.

22689729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2521087 (or 2521084 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 22689729 is about 4763.3736993858. The cubic root of 22689729 is about 283.1021078519.

The spelling of 22689729 in words is "twenty-two million, six hundred eighty-nine thousand, seven hundred twenty-nine".