22779 has 6 divisors (see below), whose sum is σ = 32916. Its totient is φ = 15180.

The previous prime is 22777. The next prime is 22783. The reversal of 22779 is 97722.

It is not a de Polignac number, because 22779 - 2¹ = 22777 is a prime.

22779 is a lucky number.

It is a plaindrome in base 10 and base 12.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (22777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1257 + ... + 1274.

It is an arithmetic number, because the mean of its divisors is an integer number (5486).

2²²⁷⁷⁹ is an apocalyptic number.

22779 is a deficient number, since it is larger than the sum of its proper divisors (10137).

22779 is a wasteful number, since it uses less digits than its factorization.

22779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537 (or 2534 counting only the distinct ones).

The product of its digits is 1764, while the sum is 27.

The square root of 22779 is about 150.9271347373. The cubic root of 22779 is about 28.3472903171.

The spelling of 22779 in words is "twenty-two thousand, seven hundred seventy-nine".