16747985 has 4 divisors (see below), whose sum is σ = 20097588. Its totient is φ = 13398384.

The previous prime is 16747981. The next prime is 16748003. The reversal of 16747985 is 58974761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12902464 + 3845521 = 3592^2 + 1961^2 .

It is a cyclic number.

It is not a de Polignac number, because 16747985 - 2² = 16747981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16747981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1674794 + ... + 1674803.

It is an arithmetic number, because the mean of its divisors is an integer number (5024397).

Almost surely, 2^16747985 is an apocalyptic number.

It is an amenable number.

16747985 is a deficient number, since it is larger than the sum of its proper divisors (3349603).

16747985 is an equidigital number, since it uses as much as digits as its factorization.

16747985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3349602.

The product of its digits is 423360, while the sum is 47.

The square root of 16747985 is about 4092.4302071019. The cubic root of 16747985 is about 255.8512370154.

The spelling of 16747985 in words is "sixteen million, seven hundred forty-seven thousand, nine hundred eighty-five".