22984781 has 2 divisors, whose sum is σ = 22984782. Its totient is φ = 22984780.

The previous prime is 22984771. The next prime is 22984789. The reversal of 22984781 is 18748922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16883881 + 6100900 = 4109^2 + 2470^2 .

It is a cyclic number.

It is not a de Polignac number, because 22984781 - 2¹⁰ = 22983757 is a prime.

It is a super-2 number, since 2×22984781² = 1056600315235922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22984789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11492390 + 11492391.

It is an arithmetic number, because the mean of its divisors is an integer number (11492391).

Almost surely, 2^22984781 is an apocalyptic number.

It is an amenable number.

22984781 is a deficient number, since it is larger than the sum of its proper divisors (1).

22984781 is an equidigital number, since it uses as much as digits as its factorization.

22984781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 41.

The square root of 22984781 is about 4794.2445703155. The cubic root of 22984781 is about 284.3239583311.

The spelling of 22984781 in words is "twenty-two million, nine hundred eighty-four thousand, seven hundred eighty-one".