16739985 has 16 divisors (see below), whose sum is σ = 28359936. Its totient is φ = 8402688.

The previous prime is 16739981. The next prime is 16739993. The reversal of 16739985 is 58993761.

It is not a de Polignac number, because 16739985 - 2² = 16739981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16739981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32569 + ... + 33078.

It is an arithmetic number, because the mean of its divisors is an integer number (1772496).

Almost surely, 2^16739985 is an apocalyptic number.

16739985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16739985 is a deficient number, since it is larger than the sum of its proper divisors (11619951).

16739985 is a wasteful number, since it uses less digits than its factorization.

16739985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65672.

The product of its digits is 408240, while the sum is 48.

The square root of 16739985 is about 4091.4526760064. The cubic root of 16739985 is about 255.8104930914.

The spelling of 16739985 in words is "sixteen million, seven hundred thirty-nine thousand, nine hundred eighty-five".