16933421 has 2 divisors, whose sum is σ = 16933422. Its totient is φ = 16933420.

The previous prime is 16933393. The next prime is 16933459. The reversal of 16933421 is 12433961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16933225 + 196 = 4115^2 + 14^2 .

It is a cyclic number.

It is not a de Polignac number, because 16933421 - 2¹⁰ = 16932397 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 (16933481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8466710 + 8466711.

It is an arithmetic number, because the mean of its divisors is an integer number (8466711).

Almost surely, 2^16933421 is an apocalyptic number.

It is an amenable number.

16933421 is a deficient number, since it is larger than the sum of its proper divisors (1).

16933421 is an equidigital number, since it uses as much as digits as its factorization.

16933421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 29.

The square root of 16933421 is about 4115.0238152409. The cubic root of 16933421 is about 256.7920466493.

The spelling of 16933421 in words is "sixteen million, nine hundred thirty-three thousand, four hundred twenty-one".