16899949 has 12 divisors (see below), whose sum is σ = 19556320. Its totient is φ = 14553000.

The previous prime is 16899889. The next prime is 16899959. The reversal of 16899949 is 94999861.

It is not a de Polignac number, because 16899949 - 2¹¹ = 16897901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16899949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16899959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1377 + ... + 5974.

Almost surely, 2^16899949 is an apocalyptic number.

16899949 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16899949 is a deficient number, since it is larger than the sum of its proper divisors (2656371).

16899949 is a wasteful number, since it uses less digits than its factorization.

16899949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7392 (or 7381 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 55.

The square root of 16899949 is about 4110.9547552850. The cubic root of 16899949 is about 256.6227362456.

The spelling of 16899949 in words is "sixteen million, eight hundred ninety-nine thousand, nine hundred forty-nine".