22143929 has 2 divisors, whose sum is σ = 22143930. Its totient is φ = 22143928.

The previous prime is 22143899. The next prime is 22143931. The reversal of 22143929 is 92934122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15523600 + 6620329 = 3940^2 + 2573^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22143929 is a prime.

Together with 22143931, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22143895 and 22143904.

It is not a weakly prime, because it can be changed into another prime (22143959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11071964 + 11071965.

It is an arithmetic number, because the mean of its divisors is an integer number (11071965).

Almost surely, 2^22143929 is an apocalyptic number.

It is an amenable number.

22143929 is a deficient number, since it is larger than the sum of its proper divisors (1).

22143929 is an equidigital number, since it uses as much as digits as its factorization.

22143929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 22143929 is about 4705.7336303705. The cubic root of 22143929 is about 280.8136579437.

The spelling of 22143929 in words is "twenty-two million, one hundred forty-three thousand, nine hundred twenty-nine".