22289947 has 4 divisors (see below), whose sum is σ = 22892416. Its totient is φ = 21687480.

The previous prime is 22289923. The next prime is 22289957. The reversal of 22289947 is 74998222.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22289947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22289957) 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, 301179 + ... + 301252.

It is an arithmetic number, because the mean of its divisors is an integer number (5723104).

Almost surely, 2^22289947 is an apocalyptic number.

22289947 is a deficient number, since it is larger than the sum of its proper divisors (602469).

22289947 is an equidigital number, since it uses as much as digits as its factorization.

22289947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602468.

The product of its digits is 145152, while the sum is 43.

The square root of 22289947 is about 4721.2230406961. The cubic root of 22289947 is about 281.4295385671.

The spelling of 22289947 in words is "twenty-two million, two hundred eighty-nine thousand, nine hundred forty-seven".