16552969 has 4 divisors (see below), whose sum is σ = 16779796. Its totient is φ = 16326144.

The previous prime is 16552961. The next prime is 16552973. The reversal of 16552969 is 96925561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12866569 + 3686400 = 3587^2 + 1920^2 .

It is a cyclic number.

It is not a de Polignac number, because 16552969 - 2³ = 16552961 is a prime.

It is a super-2 number, since 2×16552969² = 548001565429922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16552961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113304 + ... + 113449.

It is an arithmetic number, because the mean of its divisors is an integer number (4194949).

Almost surely, 2^16552969 is an apocalyptic number.

It is an amenable number.

16552969 is a deficient number, since it is larger than the sum of its proper divisors (226827).

16552969 is an equidigital number, since it uses as much as digits as its factorization.

16552969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226826.

The product of its digits is 145800, while the sum is 43.

The square root of 16552969 is about 4068.5340111642. The cubic root of 16552969 is about 254.8543009792.

It can be divided in two parts, 1655 and 2969, that added together give a square (4624 = 68²).

The spelling of 16552969 in words is "sixteen million, five hundred fifty-two thousand, nine hundred sixty-nine".