16381003 has 2 divisors, whose sum is σ = 16381004. Its totient is φ = 16381002.

The previous prime is 16380971. The next prime is 16381007. The reversal of 16381003 is 30018361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16381003 - 2⁵ = 16380971 is a prime.

It is not a weakly prime, because it can be changed into another prime (16381007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8190501 + 8190502.

It is an arithmetic number, because the mean of its divisors is an integer number (8190502).

Almost surely, 2^16381003 is an apocalyptic number.

16381003 is a deficient number, since it is larger than the sum of its proper divisors (1).

16381003 is an equidigital number, since it uses as much as digits as its factorization.

16381003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 16381003 is about 4047.3451792502. The cubic root of 16381003 is about 253.9686809091.

Adding to 16381003 its reverse (30018361), we get a palindrome (46399364).

The spelling of 16381003 in words is "sixteen million, three hundred eighty-one thousand, three".