22712489 has 2 divisors, whose sum is σ = 22712490. Its totient is φ = 22712488.

The previous prime is 22712447. The next prime is 22712497. The reversal of 22712489 is 98421722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22250089 + 462400 = 4717^2 + 680^2 .

It is a cyclic number.

It is not a de Polignac number, because 22712489 - 2¹² = 22708393 is a prime.

It is not a weakly prime, because it can be changed into another prime (22712419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11356244 + 11356245.

It is an arithmetic number, because the mean of its divisors is an integer number (11356245).

Almost surely, 2^22712489 is an apocalyptic number.

It is an amenable number.

22712489 is a deficient number, since it is larger than the sum of its proper divisors (1).

22712489 is an equidigital number, since it uses as much as digits as its factorization.

22712489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The square root of 22712489 is about 4765.7621635999. The cubic root of 22712489 is about 283.1967358474.

The spelling of 22712489 in words is "twenty-two million, seven hundred twelve thousand, four hundred eighty-nine".