331685329 has 4 divisors (see below), whose sum is σ = 332402176. Its totient is φ = 330968484.

The previous prime is 331685327. The next prime is 331685381. The reversal of 331685329 is 923586133.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 331685329 - 2¹ = 331685327 is a prime.

It is a super-2 number, since 2×331685329² = 220030314947676482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331685291 and 331685300.

It is not an unprimeable number, because it can be changed into a prime (331685327) 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, 357729 + ... + 358654.

It is an arithmetic number, because the mean of its divisors is an integer number (83100544).

Almost surely, 2^331685329 is an apocalyptic number.

It is an amenable number.

331685329 is a deficient number, since it is larger than the sum of its proper divisors (716847).

331685329 is an equidigital number, since it uses as much as digits as its factorization.

331685329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716846.

The product of its digits is 116640, while the sum is 40.

The square root of 331685329 is about 18212.2302039042. The cubic root of 331685329 is about 692.2167236640.

The spelling of 331685329 in words is "three hundred thirty-one million, six hundred eighty-five thousand, three hundred twenty-nine".