16698149 has 4 divisors (see below), whose sum is σ = 17982636. Its totient is φ = 15413664.

The previous prime is 16698139. The next prime is 16698173. The reversal of 16698149 is 94189661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94189661 = 239 ⋅394099.

It can be written as a sum of positive squares in 2 ways, for example, as 11175649 + 5522500 = 3343^2 + 2350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16698149 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 (16698139) 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, 642224 + ... + 642249.

It is an arithmetic number, because the mean of its divisors is an integer number (4495659).

Almost surely, 2^16698149 is an apocalyptic number.

It is an amenable number.

16698149 is a deficient number, since it is larger than the sum of its proper divisors (1284487).

16698149 is a wasteful number, since it uses less digits than its factorization.

16698149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284486.

The product of its digits is 93312, while the sum is 44.

The square root of 16698149 is about 4086.3368681498. The cubic root of 16698149 is about 255.5972110282.

The spelling of 16698149 in words is "sixteen million, six hundred ninety-eight thousand, one hundred forty-nine".