16609523 has 4 divisors (see below), whose sum is σ = 18982320. Its totient is φ = 14236728.

The previous prime is 16609499. The next prime is 16609543. The reversal of 16609523 is 32590661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32590661 = 281 ⋅115981.

It is a cyclic number.

It is not a de Polignac number, because 16609523 - 2¹⁰ = 16608499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16609523.

It is not an unprimeable number, because it can be changed into a prime (16609543) 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, 1186388 + ... + 1186401.

It is an arithmetic number, because the mean of its divisors is an integer number (4745580).

Almost surely, 2^16609523 is an apocalyptic number.

16609523 is a deficient number, since it is larger than the sum of its proper divisors (2372797).

16609523 is an equidigital number, since it uses as much as digits as its factorization.

16609523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2372796.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 16609523 is about 4075.4782541439. The cubic root of 16609523 is about 255.1442116483.

The spelling of 16609523 in words is "sixteen million, six hundred nine thousand, five hundred twenty-three".