22649789 has 2 divisors, whose sum is σ = 22649790. Its totient is φ = 22649788.

The previous prime is 22649773. The next prime is 22649801. The reversal of 22649789 is 98794622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21808900 + 840889 = 4670^2 + 917^2 .

It is a cyclic number.

It is not a de Polignac number, because 22649789 - 2⁴ = 22649773 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22649719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11324894 + 11324895.

It is an arithmetic number, because the mean of its divisors is an integer number (11324895).

Almost surely, 2^22649789 is an apocalyptic number.

It is an amenable number.

22649789 is a deficient number, since it is larger than the sum of its proper divisors (1).

22649789 is an equidigital number, since it uses as much as digits as its factorization.

22649789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 22649789 is about 4759.1794460810. The cubic root of 22649789 is about 282.9358984451.

The spelling of 22649789 in words is "twenty-two million, six hundred forty-nine thousand, seven hundred eighty-nine".