398821717579 has 8 divisors (see below), whose sum is σ = 399396730880. Its totient is φ = 398246801256.

The previous prime is 398821717559. The next prime is 398821717597. The reversal of 398821717579 is 975717128893.

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 398821717579 - 2¹⁹ = 398821193291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398821717529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13558522 + ... + 13587904.

It is an arithmetic number, because the mean of its divisors is an integer number (49924591360).

Almost surely, 2^398821717579 is an apocalyptic number.

398821717579 is a deficient number, since it is larger than the sum of its proper divisors (575013301).

398821717579 is a wasteful number, since it uses less digits than its factorization.

398821717579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48489.

The product of its digits is 53343360, while the sum is 67.

The spelling of 398821717579 in words is "three hundred ninety-eight billion, eight hundred twenty-one million, seven hundred seventeen thousand, five hundred seventy-nine".