16947229 has 4 divisors (see below), whose sum is σ = 18250876. Its totient is φ = 15643584.

The previous prime is 16947209. The next prime is 16947233. The reversal of 16947229 is 92274961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92274961 = 53 ⋅1741037.

It can be written as a sum of positive squares in 2 ways, for example, as 5904900 + 11042329 = 2430^2 + 3323^2 .

It is a cyclic number.

It is not a de Polignac number, because 16947229 - 2¹³ = 16939037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16947191 and 16947200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16947209) 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, 651804 + ... + 651829.

It is an arithmetic number, because the mean of its divisors is an integer number (4562719).

Almost surely, 2^16947229 is an apocalyptic number.

It is an amenable number.

16947229 is a deficient number, since it is larger than the sum of its proper divisors (1303647).

16947229 is a wasteful number, since it uses less digits than its factorization.

16947229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303646.

The product of its digits is 54432, while the sum is 40.

The square root of 16947229 is about 4116.7012279251. The cubic root of 16947229 is about 256.8618262336.

The spelling of 16947229 in words is "sixteen million, nine hundred forty-seven thousand, two hundred twenty-nine".