16601329 has 2 divisors, whose sum is σ = 16601330. Its totient is φ = 16601328.

The previous prime is 16601323. The next prime is 16601339. The reversal of 16601329 is 92310661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12439729 + 4161600 = 3527^2 + 2040^2 .

It is a cyclic number.

It is not a de Polignac number, because 16601329 - 2¹⁵ = 16568561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16601297 and 16601306.

It is not a weakly prime, because it can be changed into another prime (16601323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8300664 + 8300665.

It is an arithmetic number, because the mean of its divisors is an integer number (8300665).

Almost surely, 2^16601329 is an apocalyptic number.

It is an amenable number.

16601329 is a deficient number, since it is larger than the sum of its proper divisors (1).

16601329 is an equidigital number, since it uses as much as digits as its factorization.

16601329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 16601329 is about 4074.4728493389. The cubic root of 16601329 is about 255.1022478592.

The spelling of 16601329 in words is "sixteen million, six hundred one thousand, three hundred twenty-nine".