16639149 has 8 divisors (see below), whose sum is σ = 22308832. Its totient is φ = 11031120.

The previous prime is 16639123. The next prime is 16639163. The reversal of 16639149 is 94193661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-16639149 is a prime.

It is a super-2 number, since 2×16639149² = 553722558888402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16639199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14779 + ... + 15864.

It is an arithmetic number, because the mean of its divisors is an integer number (2788604).

Almost surely, 2^16639149 is an apocalyptic number.

It is an amenable number.

16639149 is a deficient number, since it is larger than the sum of its proper divisors (5669683).

16639149 is a wasteful number, since it uses less digits than its factorization.

16639149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30827.

The product of its digits is 34992, while the sum is 39.

The square root of 16639149 is about 4079.1113002712. Note that the first 3 decimals coincide. The cubic root of 16639149 is about 255.2958197078.

The spelling of 16639149 in words is "sixteen million, six hundred thirty-nine thousand, one hundred forty-nine".