22785487 has 2 divisors, whose sum is σ = 22785488. Its totient is φ = 22785486.

The previous prime is 22785467. The next prime is 22785493. The reversal of 22785487 is 78458722.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22785487 - 2⁷ = 22785359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22785437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11392743 + 11392744.

It is an arithmetic number, because the mean of its divisors is an integer number (11392744).

Almost surely, 2^22785487 is an apocalyptic number.

22785487 is a deficient number, since it is larger than the sum of its proper divisors (1).

22785487 is an equidigital number, since it uses as much as digits as its factorization.

22785487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 250880, while the sum is 43.

The square root of 22785487 is about 4773.4146059189. The cubic root of 22785487 is about 283.4998097393.

The spelling of 22785487 in words is "twenty-two million, seven hundred eighty-five thousand, four hundred eighty-seven".