398423484324893 has 4 divisors (see below), whose sum is σ = 398848696155420. Its totient is φ = 397998272494368.

The previous prime is 398423484324841. The next prime is 398423484324919.

398423484324893 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 52420814609284 + 346002669715609 = 7240222^2 + 18601147^2 .

It is a cyclic number.

It is not a de Polignac number, because 398423484324893 - 2¹⁶ = 398423484259357 is a prime.

It is a super-2 number, since 2×398423484324893² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 398423484324893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398423484326893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212605913858 + ... + 212605915731.

It is an arithmetic number, because the mean of its divisors is an integer number (99712174038855).

Almost surely, 2^{398423484324893} is an apocalyptic number.

It is an amenable number.

398423484324893 is a deficient number, since it is larger than the sum of its proper divisors (425211830527).

398423484324893 is an equidigital number, since it uses as much as digits as its factorization.

398423484324893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425211830526.

The product of its digits is 3439853568, while the sum is 74.

The spelling of 398423484324893 in words is "three hundred ninety-eight trillion, four hundred twenty-three billion, four hundred eighty-four million, three hundred twenty-four thousand, eight hundred ninety-three".