22787 has 2 divisors, whose sum is σ = 22788. Its totient is φ = 22786.

The previous prime is 22783. The next prime is 22807. The reversal of 22787 is 78722.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22787 - 2² = 22783 is a prime.

It is a Chen prime.

It is a plaindrome in base 12.

It is not a weakly prime, because it can be changed into another prime (22783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11393 + 11394.

It is an arithmetic number, because the mean of its divisors is an integer number (11394).

2²²⁷⁸⁷ is an apocalyptic number.

22787 is a deficient number, since it is larger than the sum of its proper divisors (1).

22787 is an equidigital number, since it uses as much as digits as its factorization.

22787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1568, while the sum is 26.

The square root of 22787 is about 150.9536352659. The cubic root of 22787 is about 28.3506084577.

The spelling of 22787 in words is "twenty-two thousand, seven hundred eighty-seven".