999974000169 has 27 divisors (see below), whose sum is σ = 1451167882437. Its totient is φ = 663543373824.

The previous prime is 999974000161. The next prime is 999974000219. The reversal of 999974000169 is 961000479999.

The square root of 999974000169 is 999987.

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

It can be written as a sum of positive squares in 4 ways, for example, as 967789640169 + 32184360000 = 983763^2 + 179400^2 .

It is not a de Polignac number, because 999974000169 - 2³ = 999974000161 is a prime.

It is a super-2 number, since 2×999974000169² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (999974000161) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 770989329 + ... + 770990625.

Almost surely, 2^999974000169 is an apocalyptic number.

999974000169 is the 999987-th square number.

999974000169 is the 499994-th centered octagonal number.

It is an amenable number.

999974000169 is a deficient number, since it is larger than the sum of its proper divisors (451193882268).

999974000169 is an frugal number, since it uses more digits than its factorization.

999974000169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3114 (or 1557 counting only the distinct ones).

The product of its (nonzero) digits is 9920232, while the sum is 63.

The spelling of 999974000169 in words is "nine hundred ninety-nine billion, nine hundred seventy-four million, one hundred sixty-nine", and thus it is an aban number.