22739447 has 4 divisors (see below), whose sum is σ = 23936280. Its totient is φ = 21542616.

The previous prime is 22739407. The next prime is 22739449. The reversal of 22739447 is 74493722.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22739447 - 2¹² = 22735351 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22739447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22739449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 598388 + ... + 598425.

It is an arithmetic number, because the mean of its divisors is an integer number (5984070).

Almost surely, 2^22739447 is an apocalyptic number.

22739447 is a deficient number, since it is larger than the sum of its proper divisors (1196833).

22739447 is a wasteful number, since it uses less digits than its factorization.

22739447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196832.

The product of its digits is 84672, while the sum is 38.

The square root of 22739447 is about 4768.5896237777. The cubic root of 22739447 is about 283.3087358885.

The spelling of 22739447 in words is "twenty-two million, seven hundred thirty-nine thousand, four hundred forty-seven".