16645039 has 2 divisors, whose sum is σ = 16645040. Its totient is φ = 16645038.

The previous prime is 16645033. The next prime is 16645049. The reversal of 16645039 is 93054661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16645039 - 2⁷ = 16644911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16644995 and 16645013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16645033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8322519 + 8322520.

It is an arithmetic number, because the mean of its divisors is an integer number (8322520).

Almost surely, 2^16645039 is an apocalyptic number.

16645039 is a deficient number, since it is larger than the sum of its proper divisors (1).

16645039 is an equidigital number, since it uses as much as digits as its factorization.

16645039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 16645039 is about 4079.8332073750. The cubic root of 16645039 is about 255.3259397375.

The spelling of 16645039 in words is "sixteen million, six hundred forty-five thousand, thirty-nine".