16491203 has 2 divisors, whose sum is σ = 16491204. Its totient is φ = 16491202.

The previous prime is 16491157. The next prime is 16491257. The reversal of 16491203 is 30219461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16491203 - 2¹⁰ = 16490179 is a prime.

It is not a weakly prime, because it can be changed into another prime (16491263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8245601 + 8245602.

It is an arithmetic number, because the mean of its divisors is an integer number (8245602).

Almost surely, 2^16491203 is an apocalyptic number.

16491203 is a deficient number, since it is larger than the sum of its proper divisors (1).

16491203 is an equidigital number, since it uses as much as digits as its factorization.

16491203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 16491203 is about 4060.9362221045. The cubic root of 16491203 is about 254.5369168171.

The spelling of 16491203 in words is "sixteen million, four hundred ninety-one thousand, two hundred three".