999746 has 16 divisors (see below), whose sum is σ = 1693440. Its totient is φ = 438480.

The previous prime is 999727. The next prime is 999749. The reversal of 999746 is 647999.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 999697 and 999706.

It is not an unprimeable number, because it can be changed into a prime (999749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146 + ... + 1421.

It is an arithmetic number, because the mean of its divisors is an integer number (105840).

2⁹⁹⁹⁷⁴⁶ is an apocalyptic number.

999746 is a deficient number, since it is larger than the sum of its proper divisors (693694).

999746 is a wasteful number, since it uses less digits than its factorization.

999746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1609.

The product of its digits is 122472, while the sum is 44.

The square root of 999746 is about 999.8729919345. The cubic root of 999746 is about 99.9915326164.

The spelling of 999746 in words is "nine hundred ninety-nine thousand, seven hundred forty-six".