16939465 has 4 divisors (see below), whose sum is σ = 20327364. Its totient is φ = 13551568.

The previous prime is 16939457. The next prime is 16939487. The reversal of 16939465 is 56493961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56493961 = 4441 ⋅12721.

It can be written as a sum of positive squares in 2 ways, for example, as 3455881 + 13483584 = 1859^2 + 3672^2 .

It is a cyclic number.

It is not a de Polignac number, because 16939465 - 2³ = 16939457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1693942 + ... + 1693951.

It is an arithmetic number, because the mean of its divisors is an integer number (5081841).

Almost surely, 2^16939465 is an apocalyptic number.

It is an amenable number.

16939465 is a deficient number, since it is larger than the sum of its proper divisors (3387899).

16939465 is an equidigital number, since it uses as much as digits as its factorization.

16939465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3387898.

The product of its digits is 174960, while the sum is 43.

The square root of 16939465 is about 4115.7581318634. The cubic root of 16939465 is about 256.8225950444.

The spelling of 16939465 in words is "sixteen million, nine hundred thirty-nine thousand, four hundred sixty-five".