16789381 has 4 divisors (see below), whose sum is σ = 19187872. Its totient is φ = 14390892.

The previous prime is 16789351. The next prime is 16789391. The reversal of 16789381 is 18398761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16789381 - 2⁹ = 16788869 is a prime.

It is a super-2 number, since 2×16789381² = 563766628726322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16789351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1199235 + ... + 1199248.

It is an arithmetic number, because the mean of its divisors is an integer number (4796968).

Almost surely, 2^16789381 is an apocalyptic number.

It is an amenable number.

16789381 is a deficient number, since it is larger than the sum of its proper divisors (2398491).

16789381 is an equidigital number, since it uses as much as digits as its factorization.

16789381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398490.

The product of its digits is 72576, while the sum is 43.

The square root of 16789381 is about 4097.4847162619. The cubic root of 16789381 is about 256.0618594408.

The spelling of 16789381 in words is "sixteen million, seven hundred eighty-nine thousand, three hundred eighty-one".