22747789 has 4 divisors (see below), whose sum is σ = 22778140. Its totient is φ = 22717440.

The previous prime is 22747783. The next prime is 22747799. The reversal of 22747789 is 98774722.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13032100 + 9715689 = 3610^2 + 3117^2 .

It is a cyclic number.

It is not a de Polignac number, because 22747789 - 2¹⁷ = 22616717 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 (22747783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14022 + ... + 15559.

It is an arithmetic number, because the mean of its divisors is an integer number (5694535).

Almost surely, 2^22747789 is an apocalyptic number.

It is an amenable number.

22747789 is a deficient number, since it is larger than the sum of its proper divisors (30351).

22747789 is an equidigital number, since it uses as much as digits as its factorization.

22747789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30350.

The product of its digits is 395136, while the sum is 46.

The square root of 22747789 is about 4769.4642256757. The cubic root of 22747789 is about 283.3433757302.

The spelling of 22747789 in words is "twenty-two million, seven hundred forty-seven thousand, seven hundred eighty-nine".