22390829 has 2 divisors, whose sum is σ = 22390830. Its totient is φ = 22390828.

The previous prime is 22390811. The next prime is 22390919. The reversal of 22390829 is 92809322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22306729 + 84100 = 4723^2 + 290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22390829 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22392829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11195414 + 11195415.

It is an arithmetic number, because the mean of its divisors is an integer number (11195415).

Almost surely, 2^22390829 is an apocalyptic number.

It is an amenable number.

22390829 is a deficient number, since it is larger than the sum of its proper divisors (1).

22390829 is an equidigital number, since it uses as much as digits as its factorization.

22390829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 22390829 is about 4731.8948635827. The cubic root of 22390829 is about 281.8534733308.

The spelling of 22390829 in words is "twenty-two million, three hundred ninety thousand, eight hundred twenty-nine".