16812949 has 8 divisors (see below), whose sum is σ = 17838360. Its totient is φ = 15791616.

The previous prime is 16812947. The next prime is 16812959. The reversal of 16812949 is 94921861.

It can be written as a sum of positive squares in 4 ways, for example, as 5130225 + 11682724 = 2265^2 + 3418^2 .

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 16812949 - 2¹ = 16812947 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 (16812941) 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, 13497 + ... + 14689.

It is an arithmetic number, because the mean of its divisors is an integer number (2229795).

Almost surely, 2^16812949 is an apocalyptic number.

It is an amenable number.

16812949 is a deficient number, since it is larger than the sum of its proper divisors (1025411).

16812949 is a wasteful number, since it uses less digits than its factorization.

16812949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2039.

The product of its digits is 31104, while the sum is 40.

The square root of 16812949 is about 4100.3596183750. The cubic root of 16812949 is about 256.1816185572.

The spelling of 16812949 in words is "sixteen million, eight hundred twelve thousand, nine hundred forty-nine".