999537 has 16 divisors (see below), whose sum is σ = 1661952. Its totient is φ = 519120.

The previous prime is 999529. The next prime is 999541. The reversal of 999537 is 735999.

It is a happy number.

It is not a de Polignac number, because 999537 - 2³ = 999529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1933 + ... + 2394.

It is an arithmetic number, because the mean of its divisors is an integer number (103872).

2⁹⁹⁹⁵³⁷ is an apocalyptic number.

It is an amenable number.

999537 is a deficient number, since it is larger than the sum of its proper divisors (662415).

999537 is a wasteful number, since it uses less digits than its factorization.

999537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4348.

The product of its digits is 76545, while the sum is 42.

The square root of 999537 is about 999.7684731977. The cubic root of 999537 is about 99.9845642842.

The spelling of 999537 in words is "nine hundred ninety-nine thousand, five hundred thirty-seven".