999489537 has 10 divisors (see below), whose sum is σ = 1493064738. Its totient is φ = 666326304.

The previous prime is 999489527. The next prime is 999489571. The reversal of 999489537 is 735984999.

It is a happy number.

999489537 is a `hidden beast` number, since 9 + 9 + 94 + 8 + 9 + 537 = 666.

It can be written as a sum of positive squares in only one way, i.e., 957964401 + 41525136 = 30951^2 + 6444^2 .

It is not a de Polignac number, because 999489537 - 2¹² = 999485441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999489527) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6169608 + ... + 6169769.

It is a Proth number, since it is equal to 15251 ⋅ 2¹⁶ + 1 and 15251 < 2¹⁶.

Almost surely, 2^999489537 is an apocalyptic number.

It is an amenable number.

999489537 is a deficient number, since it is larger than the sum of its proper divisors (493575201).

999489537 is a wasteful number, since it uses less digits than its factorization.

999489537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12339389 (or 12339380 counting only the distinct ones).

The product of its digits is 22044960, while the sum is 63.

The square root of 999489537 is about 31614.7044427115. The cubic root of 999489537 is about 999.8298167060.

The spelling of 999489537 in words is "nine hundred ninety-nine million, four hundred eighty-nine thousand, five hundred thirty-seven".