399928329499 has 4 divisors (see below), whose sum is σ = 400121627040. Its totient is φ = 399735031960.

The previous prime is 399928329419. The next prime is 399928329533. The reversal of 399928329499 is 994923829993.

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

It is a cyclic number.

It is not a de Polignac number, because 399928329499 - 2¹¹ = 399928327451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399928329419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96645667 + ... + 96649804.

It is an arithmetic number, because the mean of its divisors is an integer number (100030406760).

Almost surely, 2^399928329499 is an apocalyptic number.

399928329499 is a deficient number, since it is larger than the sum of its proper divisors (193297541).

399928329499 is a wasteful number, since it uses less digits than its factorization.

399928329499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193297540.

The product of its digits is 612220032, while the sum is 76.

The spelling of 399928329499 in words is "three hundred ninety-nine billion, nine hundred twenty-eight million, three hundred twenty-nine thousand, four hundred ninety-nine".