999612 has 18 divisors (see below), whose sum is σ = 2526888. Its totient is φ = 333192.

The previous prime is 999611. The next prime is 999613. The reversal of 999612 is 216999.

999612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (999611) and next prime (999613).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 27767 = 999612 / (9 + 9 + 9 + 6 + 1 + 2).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13848 + ... + 13919.

2⁹⁹⁹⁶¹² is an apocalyptic number.

It is an amenable number.

999612 is an abundant number, since it is smaller than the sum of its proper divisors (1527276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999612 is a wasteful number, since it uses less digits than its factorization.

999612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27777 (or 27772 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 999612 is about 999.8059811783. The cubic root of 999612 is about 99.9870649936.

The spelling of 999612 in words is "nine hundred ninety-nine thousand, six hundred twelve".