329939663 has 4 divisors (see below), whose sum is σ = 329985048. Its totient is φ = 329894280.

The previous prime is 329939657. The next prime is 329939677. The reversal of 329939663 is 366939923.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366939923 = 7 ⋅52419989.

It is a cyclic number.

It is not a de Polignac number, because 329939663 - 2⁴ = 329939647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (329839663) 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, 9056 + ... + 27237.

It is an arithmetic number, because the mean of its divisors is an integer number (82496262).

Almost surely, 2^329939663 is an apocalyptic number.

329939663 is a deficient number, since it is larger than the sum of its proper divisors (45385).

329939663 is an equidigital number, since it uses as much as digits as its factorization.

329939663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45384.

The product of its digits is 1417176, while the sum is 50.

The square root of 329939663 is about 18164.2413273993. The cubic root of 329939663 is about 691.0002038475. Note that the first 3 decimals are identical.

The spelling of 329939663 in words is "three hundred twenty-nine million, nine hundred thirty-nine thousand, six hundred sixty-three".