22782979 has 4 divisors (see below), whose sum is σ = 22848984. Its totient is φ = 22716976.

The previous prime is 22782967. The next prime is 22782983. The reversal of 22782979 is 97928722.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22782979 - 2¹¹ = 22780931 is a prime.

It is a super-2 number, since 2×22782979² = 1038128264228882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22782959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32482 + ... + 33175.

It is an arithmetic number, because the mean of its divisors is an integer number (5712246).

Almost surely, 2^22782979 is an apocalyptic number.

22782979 is a deficient number, since it is larger than the sum of its proper divisors (66005).

22782979 is an equidigital number, since it uses as much as digits as its factorization.

22782979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66004.

The product of its digits is 254016, while the sum is 46.

The square root of 22782979 is about 4773.1518936652. The cubic root of 22782979 is about 283.4894077437.

The spelling of 22782979 in words is "twenty-two million, seven hundred eighty-two thousand, nine hundred seventy-nine".