16933391 has 2 divisors, whose sum is σ = 16933392. Its totient is φ = 16933390.

The previous prime is 16933381. The next prime is 16933393. The reversal of 16933391 is 19333961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16933391 - 2⁶ = 16933327 is a prime.

Together with 16933393, 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 (16933393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8466695 + 8466696.

It is an arithmetic number, because the mean of its divisors is an integer number (8466696).

Almost surely, 2^16933391 is an apocalyptic number.

16933391 is a deficient number, since it is larger than the sum of its proper divisors (1).

16933391 is an equidigital number, since it uses as much as digits as its factorization.

16933391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13122, while the sum is 35.

The square root of 16933391 is about 4115.0201700599. The cubic root of 16933391 is about 256.7918950011.

The spelling of 16933391 in words is "sixteen million, nine hundred thirty-three thousand, three hundred ninety-one".