398573239681 has 8 divisors (see below), whose sum is σ = 401551740800. Its totient is φ = 395596325520.

The previous prime is 398573239667. The next prime is 398573239699. The reversal of 398573239681 is 186932375893.

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 398573239681 - 2¹⁹ = 398572715393 is a prime.

It is a super-2 number, since 2×398573239681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398573239621) 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, 109855 + ... + 899563.

It is an arithmetic number, because the mean of its divisors is an integer number (50193967600).

Almost surely, 2^398573239681 is an apocalyptic number.

It is an amenable number.

398573239681 is a deficient number, since it is larger than the sum of its proper divisors (2978501119).

398573239681 is a wasteful number, since it uses less digits than its factorization.

398573239681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793479.

The product of its digits is 58786560, while the sum is 64.

The spelling of 398573239681 in words is "three hundred ninety-eight billion, five hundred seventy-three million, two hundred thirty-nine thousand, six hundred eighty-one".