16417945 has 4 divisors (see below), whose sum is σ = 19701540. Its totient is φ = 13134352.

The previous prime is 16417909. The next prime is 16417997. The reversal of 16417945 is 54971461.

16417945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 4946176 + 11471769 = 2224^2 + 3387^2 .

It is a cyclic number.

It is not a de Polignac number, because 16417945 - 2¹³ = 16409753 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1641790 + ... + 1641799.

It is an arithmetic number, because the mean of its divisors is an integer number (4925385).

Almost surely, 2^16417945 is an apocalyptic number.

It is an amenable number.

16417945 is a deficient number, since it is larger than the sum of its proper divisors (3283595).

16417945 is an equidigital number, since it uses as much as digits as its factorization.

16417945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283594.

The product of its digits is 30240, while the sum is 37.

The square root of 16417945 is about 4051.9063414645. The cubic root of 16417945 is about 254.1594520333.

The spelling of 16417945 in words is "sixteen million, four hundred seventeen thousand, nine hundred forty-five".