22744639 has 2 divisors, whose sum is σ = 22744640. Its totient is φ = 22744638.

The previous prime is 22744633. The next prime is 22744649. The reversal of 22744639 is 93644722.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22744639 - 2⁷ = 22744511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22744598 and 22744607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22744633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11372319 + 11372320.

It is an arithmetic number, because the mean of its divisors is an integer number (11372320).

Almost surely, 2^22744639 is an apocalyptic number.

22744639 is a deficient number, since it is larger than the sum of its proper divisors (1).

22744639 is an equidigital number, since it uses as much as digits as its factorization.

22744639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 37.

The square root of 22744639 is about 4769.1339884721. The cubic root of 22744639 is about 283.3302964688.

The spelling of 22744639 in words is "twenty-two million, seven hundred forty-four thousand, six hundred thirty-nine".