22749449 has 2 divisors, whose sum is σ = 22749450. Its totient is φ = 22749448.

The previous prime is 22749439. The next prime is 22749491. The reversal of 22749449 is 94494722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22733824 + 15625 = 4768^2 + 125^2 .

It is a cyclic number.

It is not a de Polignac number, because 22749449 - 2¹² = 22745353 is a prime.

It is not a weakly prime, because it can be changed into another prime (22749409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11374724 + 11374725.

It is an arithmetic number, because the mean of its divisors is an integer number (11374725).

Almost surely, 2^22749449 is an apocalyptic number.

It is an amenable number.

22749449 is a deficient number, since it is larger than the sum of its proper divisors (1).

22749449 is an equidigital number, since it uses as much as digits as its factorization.

22749449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The square root of 22749449 is about 4769.6382462405. The cubic root of 22749449 is about 283.3502678075.

The spelling of 22749449 in words is "twenty-two million, seven hundred forty-nine thousand, four hundred forty-nine".