975999 has 4 divisors (see below), whose sum is σ = 1301336. Its totient is φ = 650664.

The previous prime is 975991. The next prime is 976009. The reversal of 975999 is 999579.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 975999 - 2³ = 975991 is a prime.

It is a D-number.

It is a Duffinian number.

975999 is a modest number, since divided by 999 gives 975 as remainder.

975999 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (975991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162664 + ... + 162669.

It is an arithmetic number, because the mean of its divisors is an integer number (325334).

2⁹⁷⁵⁹⁹⁹ is an apocalyptic number.

975999 is a deficient number, since it is larger than the sum of its proper divisors (325337).

975999 is a wasteful number, since it uses less digits than its factorization.

975999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325336.

The product of its digits is 229635, while the sum is 48.

The square root of 975999 is about 987.9266167079. The cubic root of 975999 is about 99.1934793993.

The spelling of 975999 in words is "nine hundred seventy-five thousand, nine hundred ninety-nine".