16985739 has 8 divisors (see below), whose sum is σ = 22902480. Its totient is φ = 11196416.

The previous prime is 16985719. The next prime is 16985747. The reversal of 16985739 is 93758961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16985739 - 2¹³ = 16977547 is a prime.

It is a super-2 number, since 2×16985739² = 577030658752242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16985719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31542 + ... + 32075.

It is an arithmetic number, because the mean of its divisors is an integer number (2862810).

Almost surely, 2^16985739 is an apocalyptic number.

16985739 is a deficient number, since it is larger than the sum of its proper divisors (5916741).

16985739 is an equidigital number, since it uses as much as digits as its factorization.

16985739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63709.

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

The square root of 16985739 is about 4121.3758625003. The cubic root of 16985739 is about 257.0562388595.

The spelling of 16985739 in words is "sixteen million, nine hundred eighty-five thousand, seven hundred thirty-nine".