16442969 has 4 divisors (see below), whose sum is σ = 16588596. Its totient is φ = 16297344.

The previous prime is 16442963. The next prime is 16442983. The reversal of 16442969 is 96924461.

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 3193369 + 13249600 = 1787^2 + 3640^2 .

It is a cyclic number.

It is not a de Polignac number, because 16442969 - 2¹⁶ = 16377433 is a prime.

It is a super-3 number, since 3×16442969³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16442963) 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, 72644 + ... + 72869.

It is an arithmetic number, because the mean of its divisors is an integer number (4147149).

Almost surely, 2^16442969 is an apocalyptic number.

It is an amenable number.

16442969 is a deficient number, since it is larger than the sum of its proper divisors (145627).

16442969 is a wasteful number, since it uses less digits than its factorization.

16442969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145626.

The product of its digits is 93312, while the sum is 41.

The square root of 16442969 is about 4054.9930949386. The cubic root of 16442969 is about 254.2885152330.

The spelling of 16442969 in words is "sixteen million, four hundred forty-two thousand, nine hundred sixty-nine".