329912397 has 6 divisors (see below), whose sum is σ = 476540142. Its totient is φ = 219941592.

The previous prime is 329912393. The next prime is 329912441. The reversal of 329912397 is 793219923.

It is a happy number.

329912397 is a `hidden beast` number, since 329 + 91 + 239 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 193933476 + 135978921 = 13926^2 + 11661^2 .

It is not a de Polignac number, because 329912397 - 2² = 329912393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (329912393) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18328458 + ... + 18328475.

It is an arithmetic number, because the mean of its divisors is an integer number (79423357).

Almost surely, 2^329912397 is an apocalyptic number.

It is an amenable number.

329912397 is a deficient number, since it is larger than the sum of its proper divisors (146627745).

329912397 is a wasteful number, since it uses less digits than its factorization.

329912397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36656939 (or 36656936 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The square root of 329912397 is about 18163.4907713248. The cubic root of 329912397 is about 690.9811687201.

The spelling of 329912397 in words is "three hundred twenty-nine million, nine hundred twelve thousand, three hundred ninety-seven".