399409919999 has 8 divisors (see below), whose sum is σ = 406463112720. Its totient is φ = 392366178496.

The previous prime is 399409919989. The next prime is 399409920029. The reversal of 399409919999 is 999919904993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 399409919999 - 2⁴ = 399409919983 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 (399409919929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2277512 + ... + 2446605.

It is an arithmetic number, because the mean of its divisors is an integer number (50807889090).

Almost surely, 2^399409919999 is an apocalyptic number.

399409919999 is a deficient number, since it is larger than the sum of its proper divisors (7053192721).

399409919999 is a wasteful number, since it uses less digits than its factorization.

399409919999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4725609.

The product of its (nonzero) digits is 516560652, while the sum is 80.

The spelling of 399409919999 in words is "three hundred ninety-nine billion, four hundred nine million, nine hundred nineteen thousand, nine hundred ninety-nine".