16278349 has 2 divisors, whose sum is σ = 16278350. Its totient is φ = 16278348.

The previous prime is 16278347. The next prime is 16278377. The reversal of 16278349 is 94387261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10956100 + 5322249 = 3310^2 + 2307^2 .

It is an emirp because it is prime and its reverse (94387261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16278349 - 2¹ = 16278347 is a prime.

Together with 16278347, 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 (16278341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8139174 + 8139175.

It is an arithmetic number, because the mean of its divisors is an integer number (8139175).

Almost surely, 2^16278349 is an apocalyptic number.

It is an amenable number.

16278349 is a deficient number, since it is larger than the sum of its proper divisors (1).

16278349 is an equidigital number, since it uses as much as digits as its factorization.

16278349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 16278349 is about 4034.6436025999. The cubic root of 16278349 is about 253.4370579792.

The spelling of 16278349 in words is "sixteen million, two hundred seventy-eight thousand, three hundred forty-nine".