16613985 has 16 divisors (see below), whose sum is σ = 27440640. Its totient is φ = 8574720.

The previous prime is 16613977. The next prime is 16614007. The reversal of 16613985 is 58931661.

16613985 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16613985 - 2³ = 16613977 is a prime.

It is a super-3 number, since 3×16613985³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17400 + ... + 18329.

It is an arithmetic number, because the mean of its divisors is an integer number (1715040).

Almost surely, 2^16613985 is an apocalyptic number.

16613985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16613985 is a deficient number, since it is larger than the sum of its proper divisors (10826655).

16613985 is a wasteful number, since it uses less digits than its factorization.

16613985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35768.

The product of its digits is 38880, while the sum is 39.

The square root of 16613985 is about 4076.0256377996. The cubic root of 16613985 is about 255.1670570072.

The spelling of 16613985 in words is "sixteen million, six hundred thirteen thousand, nine hundred eighty-five".