22787423 has 2 divisors, whose sum is σ = 22787424. Its totient is φ = 22787422.

The previous prime is 22787389. The next prime is 22787447. The reversal of 22787423 is 32478722.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22787423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22787623) 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, 11393711 + 11393712.

It is an arithmetic number, because the mean of its divisors is an integer number (11393712).

Almost surely, 2^22787423 is an apocalyptic number.

22787423 is a deficient number, since it is larger than the sum of its proper divisors (1).

22787423 is an equidigital number, since it uses as much as digits as its factorization.

22787423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37632, while the sum is 35.

The square root of 22787423 is about 4773.6173914548. The cubic root of 22787423 is about 283.5078388280.

The spelling of 22787423 in words is "twenty-two million, seven hundred eighty-seven thousand, four hundred twenty-three".