999999487604593 has 6 divisors (see below), whose sum is σ = 1163264710070706. Its totient is φ = 857142417946752.

The previous prime is 999999487604573. The next prime is 999999487604609. The reversal of 999999487604593 is 395406784999999.

It can be written as a sum of positive squares in only one way, i.e., 951555423733264 + 48444063871329 = 30847292^2 + 6960177^2 .

It is not a de Polignac number, because 999999487604593 - 2⁹ = 999999487604081 is a prime.

It is a super-6 number, since 6×999999487604593⁶ (a number of 91 digits) contains 666666 as substring. Note that it is a super-d number also for d = 2.

It is the 31622769-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999999487604573) by changing a digit.

It is a nontrivial repunit in base 31622768.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10204076404080 + ... + 10204076404177.

It is an arithmetic number, because the mean of its divisors is an integer number (193877451678451).

Almost surely, 2^{999999487604593} is an apocalyptic number.

It is an amenable number.

999999487604593 is a deficient number, since it is larger than the sum of its proper divisors (163265222466113).

999999487604593 is a wasteful number, since it uses less digits than its factorization.

999999487604593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20408152808271 (or 20408152808264 counting only the distinct ones).

The product of its (nonzero) digits is 385698620160, while the sum is 100.

The spelling of 999999487604593 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, four hundred eighty-seven million, six hundred four thousand, five hundred ninety-three".