22421779 has 2 divisors, whose sum is σ = 22421780. Its totient is φ = 22421778.

The previous prime is 22421771. The next prime is 22421797. The reversal of 22421779 is 97712422.

It is a happy number.

Together with next prime (22421797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22421779 - 2³ = 22421771 is a prime.

It is not a weakly prime, because it can be changed into another prime (22421771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11210889 + 11210890.

It is an arithmetic number, because the mean of its divisors is an integer number (11210890).

Almost surely, 2^22421779 is an apocalyptic number.

22421779 is a deficient number, since it is larger than the sum of its proper divisors (1).

22421779 is an equidigital number, since it uses as much as digits as its factorization.

22421779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 34.

The square root of 22421779 is about 4735.1640943055. The cubic root of 22421779 is about 281.9832786893.

The spelling of 22421779 in words is "twenty-two million, four hundred twenty-one thousand, seven hundred seventy-nine".