16609959 has 6 divisors (see below), whose sum is σ = 23992176. Its totient is φ = 11073300.

The previous prime is 16609951. The next prime is 16609963. The reversal of 16609959 is 95990661.

It is not a de Polignac number, because 16609959 - 2³ = 16609951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16609951) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 922767 + ... + 922784.

It is an arithmetic number, because the mean of its divisors is an integer number (3998696).

Almost surely, 2^16609959 is an apocalyptic number.

16609959 is a deficient number, since it is larger than the sum of its proper divisors (7382217).

16609959 is a wasteful number, since it uses less digits than its factorization.

16609959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845557 (or 1845554 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 16609959 is about 4075.5317444476. The cubic root of 16609959 is about 255.1464441407.

The spelling of 16609959 in words is "sixteen million, six hundred nine thousand, nine hundred fifty-nine".