16949381 has 2 divisors, whose sum is σ = 16949382. Its totient is φ = 16949380.

The previous prime is 16949377. The next prime is 16949411. The reversal of 16949381 is 18394961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15880225 + 1069156 = 3985^2 + 1034^2 .

It is a cyclic number.

It is not a de Polignac number, because 16949381 - 2² = 16949377 is a prime.

It is a super-2 number, since 2×16949381² = 574563032566322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16949341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8474690 + 8474691.

It is an arithmetic number, because the mean of its divisors is an integer number (8474691).

Almost surely, 2^16949381 is an apocalyptic number.

It is an amenable number.

16949381 is a deficient number, since it is larger than the sum of its proper divisors (1).

16949381 is an equidigital number, since it uses as much as digits as its factorization.

16949381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 41.

The square root of 16949381 is about 4116.9625939520. The cubic root of 16949381 is about 256.8726980848.

The spelling of 16949381 in words is "sixteen million, nine hundred forty-nine thousand, three hundred eighty-one".