16653949 has 8 divisors (see below), whose sum is σ = 18006912. Its totient is φ = 15311280.

The previous prime is 16653929. The next prime is 16653953. The reversal of 16653949 is 94935661.

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 16653949 - 2¹⁹ = 16129661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16653919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 984 + ... + 5854.

It is an arithmetic number, because the mean of its divisors is an integer number (2250864).

Almost surely, 2^16653949 is an apocalyptic number.

It is an amenable number.

16653949 is a deficient number, since it is larger than the sum of its proper divisors (1352963).

16653949 is a wasteful number, since it uses less digits than its factorization.

16653949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5147.

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

The square root of 16653949 is about 4080.9250176890. The cubic root of 16653949 is about 255.3714898124.

The spelling of 16653949 in words is "sixteen million, six hundred fifty-three thousand, nine hundred forty-nine".