22847989 has 2 divisors, whose sum is σ = 22847990. Its totient is φ = 22847988.

The previous prime is 22847987. The next prime is 22847999. The reversal of 22847989 is 98974822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21762225 + 1085764 = 4665^2 + 1042^2 .

It is a cyclic number.

It is not a de Polignac number, because 22847989 - 2¹ = 22847987 is a prime.

Together with 22847987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22847987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11423994 + 11423995.

It is an arithmetic number, because the mean of its divisors is an integer number (11423995).

Almost surely, 2^22847989 is an apocalyptic number.

It is an amenable number.

22847989 is a deficient number, since it is larger than the sum of its proper divisors (1).

22847989 is an equidigital number, since it uses as much as digits as its factorization.

22847989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 49.

The square root of 22847989 is about 4779.9570081749. The cubic root of 22847989 is about 283.7587922522.

The spelling of 22847989 in words is "twenty-two million, eight hundred forty-seven thousand, nine hundred eighty-nine".