999986000049 has 9 divisors (see below), whose sum is σ = 1444428555609. Its totient is φ = 666655333380.

The previous prime is 999986000047. The next prime is 999986000053. The reversal of 999986000049 is 940000689999.

The square root of 999986000049 is 999993.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 999986000049 - 2¹ = 999986000047 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 999986000049.

It is not an unprimeable number, because it can be changed into a prime (999986000047) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2833314 + ... + 3166644.

Almost surely, 2^999986000049 is an apocalyptic number.

999986000049 is the 999993-rd square number.

999986000049 is the 499997-th centered octagonal number.

It is an amenable number.

999986000049 is a deficient number, since it is larger than the sum of its proper divisors (444442555560).

999986000049 is an frugal number, since it uses more digits than its factorization.

999986000049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666668 (or 333334 counting only the distinct ones).

The product of its (nonzero) digits is 11337408, while the sum is 63.

The spelling of 999986000049 in words is "nine hundred ninety-nine billion, nine hundred eighty-six million, forty-nine", and thus it is an aban number.