399520679989 has 8 divisors (see below), whose sum is σ = 409897672128. Its totient is φ = 389173811040.

The previous prime is 399520679983. The next prime is 399520680049. The reversal of 399520679989 is 989976025993.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399520679989 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 (399520679983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7503927 + ... + 7556980.

It is an arithmetic number, because the mean of its divisors is an integer number (51237209016).

Almost surely, 2^399520679989 is an apocalyptic number.

It is an amenable number.

399520679989 is a deficient number, since it is larger than the sum of its proper divisors (10376992139).

399520679989 is a wasteful number, since it uses less digits than its factorization.

399520679989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15061595.

The product of its (nonzero) digits is 595213920, while the sum is 76.

The spelling of 399520679989 in words is "three hundred ninety-nine billion, five hundred twenty million, six hundred seventy-nine thousand, nine hundred eighty-nine".