22706399 has 2 divisors, whose sum is σ = 22706400. Its totient is φ = 22706398.

The previous prime is 22706371. The next prime is 22706401. The reversal of 22706399 is 99360722.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22706399 is a prime.

Together with 22706401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22706309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11353199 + 11353200.

It is an arithmetic number, because the mean of its divisors is an integer number (11353200).

Almost surely, 2^22706399 is an apocalyptic number.

22706399 is a deficient number, since it is larger than the sum of its proper divisors (1).

22706399 is an equidigital number, since it uses as much as digits as its factorization.

22706399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 22706399 is about 4765.1231883342. The cubic root of 22706399 is about 283.1714219875.

The spelling of 22706399 in words is "twenty-two million, seven hundred six thousand, three hundred ninety-nine".