999693 has 12 divisors (see below), whose sum is σ = 1452828. Its totient is φ = 662400.

The previous prime is 999683. The next prime is 999721. The reversal of 999693 is 396999.

It can be written as a sum of positive squares in 2 ways, for example, as 660969 + 338724 = 813^2 + 582^2 .

It is not a de Polignac number, because 999693 - 2⁸ = 999437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2293 + ... + 2693.

It is an arithmetic number, because the mean of its divisors is an integer number (121069).

2⁹⁹⁹⁶⁹³ is an apocalyptic number.

It is an amenable number.

999693 is a deficient number, since it is larger than the sum of its proper divisors (453135).

999693 is a wasteful number, since it uses less digits than its factorization.

999693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684 (or 681 counting only the distinct ones).

The product of its digits is 118098, while the sum is 45.

The square root of 999693 is about 999.8464882171. The cubic root of 999693 is about 99.9897656193.

The spelling of 999693 in words is "nine hundred ninety-nine thousand, six hundred ninety-three".