16603943 has 2 divisors, whose sum is σ = 16603944. Its totient is φ = 16603942.

The previous prime is 16603931. The next prime is 16603949. The reversal of 16603943 is 34930661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16603943 - 2⁴ = 16603927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16603949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8301971 + 8301972.

It is an arithmetic number, because the mean of its divisors is an integer number (8301972).

Almost surely, 2^16603943 is an apocalyptic number.

16603943 is a deficient number, since it is larger than the sum of its proper divisors (1).

16603943 is an equidigital number, since it uses as much as digits as its factorization.

16603943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 16603943 is about 4074.7936144055. The cubic root of 16603943 is about 255.1156363914.

The spelling of 16603943 in words is "sixteen million, six hundred three thousand, nine hundred forty-three".