22785493 has 2 divisors, whose sum is σ = 22785494. Its totient is φ = 22785492.

The previous prime is 22785487. The next prime is 22785509. The reversal of 22785493 is 39458722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22496049 + 289444 = 4743^2 + 538^2 .

It is a cyclic number.

It is not a de Polignac number, because 22785493 - 2¹³ = 22777301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22785443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11392746 + 11392747.

It is an arithmetic number, because the mean of its divisors is an integer number (11392747).

Almost surely, 2^22785493 is an apocalyptic number.

It is an amenable number.

22785493 is a deficient number, since it is larger than the sum of its proper divisors (1).

22785493 is an equidigital number, since it uses as much as digits as its factorization.

22785493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 22785493 is about 4773.4152343998. The cubic root of 22785493 is about 283.4998346236.

The spelling of 22785493 in words is "twenty-two million, seven hundred eighty-five thousand, four hundred ninety-three".