161290329 has 8 divisors (see below), whose sum is σ = 224404032. Its totient is φ = 102851760.

The previous prime is 161290319. The next prime is 161290333. The reversal of 161290329 is 923092161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161290329 - 2⁴ = 161290313 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 161290329.

It is not an unprimeable number, because it can be changed into a prime (161290319) 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 7 ways as a sum of consecutive naturals, for example, 1168702 + ... + 1168839.

It is an arithmetic number, because the mean of its divisors is an integer number (28050504).

Almost surely, 2^161290329 is an apocalyptic number.

It is an amenable number.

161290329 is a deficient number, since it is larger than the sum of its proper divisors (63113703).

161290329 is a wasteful number, since it uses less digits than its factorization.

161290329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337567.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 161290329 is about 12700.0129527493. The cubic root of 161290329 is about 544.3389893105.

The spelling of 161290329 in words is "one hundred sixty-one million, two hundred ninety thousand, three hundred twenty-nine".