399675384593 has 4 divisors (see below), whose sum is σ = 399684756708. Its totient is φ = 399666012480.

The previous prime is 399675384587. The next prime is 399675384607. The reversal of 399675384593 is 395483576993.

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 383894246464 + 15781138129 = 619592^2 + 125623^2 .

It is a cyclic number.

It is not a de Polignac number, because 399675384593 - 2¹² = 399675380497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399675584593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4621796 + ... + 4707477.

It is an arithmetic number, because the mean of its divisors is an integer number (99921189177).

Almost surely, 2^399675384593 is an apocalyptic number.

It is an amenable number.

399675384593 is a deficient number, since it is larger than the sum of its proper divisors (9372115).

399675384593 is an equidigital number, since it uses as much as digits as its factorization.

399675384593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9372114.

The product of its digits is 661348800, while the sum is 71.

The spelling of 399675384593 in words is "three hundred ninety-nine billion, six hundred seventy-five million, three hundred eighty-four thousand, five hundred ninety-three".