16493649 has 4 divisors (see below), whose sum is σ = 21991536. Its totient is φ = 10995764.

The previous prime is 16493641. The next prime is 16493657. The reversal of 16493649 is 94639461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (16493641) and next prime (16493657).

It is a cyclic number.

It is not a de Polignac number, because 16493649 - 2³ = 16493641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16493649.

It is not an unprimeable number, because it can be changed into a prime (16493641) 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, 2748939 + ... + 2748944.

It is an arithmetic number, because the mean of its divisors is an integer number (5497884).

Almost surely, 2^16493649 is an apocalyptic number.

It is an amenable number.

16493649 is a deficient number, since it is larger than the sum of its proper divisors (5497887).

16493649 is an equidigital number, since it uses as much as digits as its factorization.

16493649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5497886.

The product of its digits is 139968, while the sum is 42.

The square root of 16493649 is about 4061.2373730182. The cubic root of 16493649 is about 254.5495006276.

The spelling of 16493649 in words is "sixteen million, four hundred ninety-three thousand, six hundred forty-nine".