16009933 has 4 divisors (see below), whose sum is σ = 16022908. Its totient is φ = 15996960.

The previous prime is 16009927. The next prime is 16009963. The reversal of 16009933 is 33990061.

It is the 1634-th star number.

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 11957764 + 4052169 = 3458^2 + 2013^2 .

It is a cyclic number.

It is not a de Polignac number, because 16009933 - 2²¹ = 13912781 is a prime.

It is a Duffinian number.

It is a zygodrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 16009895 and 16009904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16009963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4416 + ... + 7177.

It is an arithmetic number, because the mean of its divisors is an integer number (4005727).

Almost surely, 2^16009933 is an apocalyptic number.

It is an amenable number.

16009933 is a deficient number, since it is larger than the sum of its proper divisors (12975).

16009933 is a wasteful number, since it uses less digits than its factorization.

16009933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12974.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 16009933 is about 4001.2414323557. The cubic root of 16009933 is about 252.0363441744.

Adding to 16009933 its reverse (33990061), we get a palindrome (49999994).

The spelling of 16009933 in words is "sixteen million, nine thousand, nine hundred thirty-three".