329977681 has 8 divisors (see below), whose sum is σ = 360107424. Its totient is φ = 299869920.

The previous prime is 329977679. The next prime is 329977709. The reversal of 329977681 is 186779923.

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

It is a cyclic number.

It is not a de Polignac number, because 329977681 - 2¹ = 329977679 is a prime.

It is a super-2 number, since 2×329977681² = 217770539916275522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (329977601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53310 + ... + 59176.

It is an arithmetic number, because the mean of its divisors is an integer number (45013428).

Almost surely, 2^329977681 is an apocalyptic number.

It is an amenable number.

329977681 is a deficient number, since it is larger than the sum of its proper divisors (30129743).

329977681 is a wasteful number, since it uses less digits than its factorization.

329977681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10991.

The product of its digits is 1143072, while the sum is 52.

The square root of 329977681 is about 18165.2878039408. The cubic root of 329977681 is about 691.0267434846.

The spelling of 329977681 in words is "three hundred twenty-nine million, nine hundred seventy-seven thousand, six hundred eighty-one".