16613939 has 4 divisors (see below), whose sum is σ = 16622424. Its totient is φ = 16605456.

The previous prime is 16613911. The next prime is 16613951. The reversal of 16613939 is 93931661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 93931661 = 1571 ⋅59791.

It is a cyclic number.

It is not a de Polignac number, because 16613939 - 2¹² = 16609843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16613969) 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 in 3 ways as a sum of consecutive naturals, for example, 359 + ... + 5775.

It is an arithmetic number, because the mean of its divisors is an integer number (4155606).

Almost surely, 2^16613939 is an apocalyptic number.

16613939 is a deficient number, since it is larger than the sum of its proper divisors (8485).

16613939 is an equidigital number, since it uses as much as digits as its factorization.

16613939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8484.

The product of its digits is 26244, while the sum is 38.

The square root of 16613939 is about 4076.0199950442. The cubic root of 16613939 is about 255.1668215089.

The spelling of 16613939 in words is "sixteen million, six hundred thirteen thousand, nine hundred thirty-nine".