16912381 has 2 divisors, whose sum is σ = 16912382. Its totient is φ = 16912380.

The previous prime is 16912361. The next prime is 16912393. The reversal of 16912381 is 18321961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16040025 + 872356 = 4005^2 + 934^2 .

It is a cyclic number.

It is not a de Polignac number, because 16912381 - 2¹⁵ = 16879613 is a prime.

It is a super-2 number, since 2×16912381² = 572057262178322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16912321) 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, 8456190 + 8456191.

It is an arithmetic number, because the mean of its divisors is an integer number (8456191).

Almost surely, 2^16912381 is an apocalyptic number.

It is an amenable number.

16912381 is a deficient number, since it is larger than the sum of its proper divisors (1).

16912381 is an equidigital number, since it uses as much as digits as its factorization.

16912381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 31.

The square root of 16912381 is about 4112.4665348182. The cubic root of 16912381 is about 256.6856467290.

The spelling of 16912381 in words is "sixteen million, nine hundred twelve thousand, three hundred eighty-one".