16946389 has 2 divisors, whose sum is σ = 16946390. Its totient is φ = 16946388.

The previous prime is 16946387. The next prime is 16946417. The reversal of 16946389 is 98364961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16892100 + 54289 = 4110^2 + 233^2 .

It is a cyclic number.

It is not a de Polignac number, because 16946389 - 2¹ = 16946387 is a prime.

Together with 16946387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16946381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8473194 + 8473195.

It is an arithmetic number, because the mean of its divisors is an integer number (8473195).

Almost surely, 2^16946389 is an apocalyptic number.

It is an amenable number.

16946389 is a deficient number, since it is larger than the sum of its proper divisors (1).

16946389 is an equidigital number, since it uses as much as digits as its factorization.

16946389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 46.

The square root of 16946389 is about 4116.5992032259. The cubic root of 16946389 is about 256.8575823245.

The spelling of 16946389 in words is "sixteen million, nine hundred forty-six thousand, three hundred eighty-nine".