22170947 has 2 divisors, whose sum is σ = 22170948. Its totient is φ = 22170946.

The previous prime is 22170943. The next prime is 22170949. The reversal of 22170947 is 74907122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22170947 - 2² = 22170943 is a prime.

Together with 22170949, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22170943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11085473 + 11085474.

It is an arithmetic number, because the mean of its divisors is an integer number (11085474).

Almost surely, 2^22170947 is an apocalyptic number.

22170947 is a deficient number, since it is larger than the sum of its proper divisors (1).

22170947 is an equidigital number, since it uses as much as digits as its factorization.

22170947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 22170947 is about 4708.6035084725. The cubic root of 22170947 is about 280.9278192538.

The spelling of 22170947 in words is "twenty-two million, one hundred seventy thousand, nine hundred forty-seven".