404931690329 has 4 divisors (see below), whose sum is σ = 405248787684. Its totient is φ = 404614592976.

The previous prime is 404931690287. The next prime is 404931690379. The reversal of 404931690329 is 923096139404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 309082626304 + 95849064025 = 555952^2 + 309595^2 .

It is a cyclic number.

It is not a de Polignac number, because 404931690329 - 2³⁶ = 336212213593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404931690379) 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, 158546762 + ... + 158549315.

It is an arithmetic number, because the mean of its divisors is an integer number (101312196921).

Almost surely, 2^404931690329 is an apocalyptic number.

It is an amenable number.

404931690329 is a deficient number, since it is larger than the sum of its proper divisors (317097355).

404931690329 is a wasteful number, since it uses less digits than its factorization.

404931690329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317097354.

The product of its (nonzero) digits is 1259712, while the sum is 50.

The spelling of 404931690329 in words is "four hundred four billion, nine hundred thirty-one million, six hundred ninety thousand, three hundred twenty-nine".