16934221 has 2 divisors, whose sum is σ = 16934222. Its totient is φ = 16934220.

The previous prime is 16934219. The next prime is 16934243. The reversal of 16934221 is 12243961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10634121 + 6300100 = 3261^2 + 2510^2 .

It is a cyclic number.

It is not a de Polignac number, because 16934221 - 2¹ = 16934219 is a prime.

Together with 16934219, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16934221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16934201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8467110 + 8467111.

It is an arithmetic number, because the mean of its divisors is an integer number (8467111).

Almost surely, 2^16934221 is an apocalyptic number.

It is an amenable number.

16934221 is a deficient number, since it is larger than the sum of its proper divisors (1).

16934221 is an equidigital number, since it uses as much as digits as its factorization.

16934221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 28.

The square root of 16934221 is about 4115.1210188766. The cubic root of 16934221 is about 256.7960905339.

The spelling of 16934221 in words is "sixteen million, nine hundred thirty-four thousand, two hundred twenty-one".