22646749 has 2 divisors, whose sum is σ = 22646750. Its totient is φ = 22646748.

The previous prime is 22646747. The next prime is 22646753. The reversal of 22646749 is 94764622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17388900 + 5257849 = 4170^2 + 2293^2 .

It is a cyclic number.

It is not a de Polignac number, because 22646749 - 2¹ = 22646747 is a prime.

Together with 22646747, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22646747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11323374 + 11323375.

It is an arithmetic number, because the mean of its divisors is an integer number (11323375).

Almost surely, 2^22646749 is an apocalyptic number.

It is an amenable number.

22646749 is a deficient number, since it is larger than the sum of its proper divisors (1).

22646749 is an equidigital number, since it uses as much as digits as its factorization.

22646749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 40.

The square root of 22646749 is about 4758.8600525756. The cubic root of 22646749 is about 282.9232395543.

The spelling of 22646749 in words is "twenty-two million, six hundred forty-six thousand, seven hundred forty-nine".