329163481 has 4 divisors (see below), whose sum is σ = 329945764. Its totient is φ = 328381200.

The previous prime is 329163473. The next prime is 329163491. The reversal of 329163481 is 184361923.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 184361923 = 17 ⋅10844819.

It can be written as a sum of positive squares in 2 ways, for example, as 2277081 + 326886400 = 1509^2 + 18080^2 .

It is a cyclic number.

It is not a de Polignac number, because 329163481 - 2³ = 329163473 is a prime.

It is a super-2 number, since 2×329163481² = 216697194448074722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 329163481.

It is not an unprimeable number, because it can be changed into a prime (329163421) 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, 390510 + ... + 391351.

It is an arithmetic number, because the mean of its divisors is an integer number (82486441).

Almost surely, 2^329163481 is an apocalyptic number.

It is an amenable number.

329163481 is a deficient number, since it is larger than the sum of its proper divisors (782283).

329163481 is an equidigital number, since it uses as much as digits as its factorization.

329163481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782282.

The product of its digits is 31104, while the sum is 37.

The square root of 329163481 is about 18142.8630871756. The cubic root of 329163481 is about 690.4579197960.

The spelling of 329163481 in words is "three hundred twenty-nine million, one hundred sixty-three thousand, four hundred eighty-one".