16873391 has 2 divisors, whose sum is σ = 16873392. Its totient is φ = 16873390.

The previous prime is 16873379. The next prime is 16873397. The reversal of 16873391 is 19337861.

It is a strong prime.

It is an emirp because it is prime and its reverse (19337861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16873391 - 2⁶ = 16873327 is a prime.

It is a super-2 number, since 2×16873391² = 569422647677762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16873397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8436695 + 8436696.

It is an arithmetic number, because the mean of its divisors is an integer number (8436696).

Almost surely, 2^16873391 is an apocalyptic number.

16873391 is a deficient number, since it is larger than the sum of its proper divisors (1).

16873391 is an equidigital number, since it uses as much as digits as its factorization.

16873391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 38.

The square root of 16873391 is about 4107.7233353769. The cubic root of 16873391 is about 256.4882395904.

The spelling of 16873391 in words is "sixteen million, eight hundred seventy-three thousand, three hundred ninety-one".