22447879 has 4 divisors (see below), whose sum is σ = 22477840. Its totient is φ = 22417920.

The previous prime is 22447829. The next prime is 22447883. The reversal of 22447879 is 97874422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97874422 = 2 ⋅48937211.

It is a cyclic number.

It is not a de Polignac number, because 22447879 - 2⁹ = 22447367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22447819) 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, 13827 + ... + 15364.

It is an arithmetic number, because the mean of its divisors is an integer number (5619460).

Almost surely, 2^22447879 is an apocalyptic number.

22447879 is a deficient number, since it is larger than the sum of its proper divisors (29961).

22447879 is an equidigital number, since it uses as much as digits as its factorization.

22447879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29960.

The product of its digits is 225792, while the sum is 43.

The square root of 22447879 is about 4737.9192690463. The cubic root of 22447879 is about 282.0926501731.

The spelling of 22447879 in words is "twenty-two million, four hundred forty-seven thousand, eight hundred seventy-nine".