6975999 has 12 divisors (see below), whose sum is σ = 10100376. Its totient is φ = 4639632.

The previous prime is 6975971. The next prime is 6976033. The reversal of 6975999 is 9995796.

It is not a de Polignac number, because 6975999 - 2⁸ = 6975743 is a prime.

6975999 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6975919) 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, 5284 + ... + 6470.

It is an arithmetic number, because the mean of its divisors is an integer number (841698).

Almost surely, 2^6975999 is an apocalyptic number.

6975999 is a deficient number, since it is larger than the sum of its proper divisors (3124377).

6975999 is a wasteful number, since it uses less digits than its factorization.

6975999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846 (or 1843 counting only the distinct ones).

The product of its digits is 1377810, while the sum is 54.

The square root of 6975999 is about 2641.2116537680. The cubic root of 6975999 is about 191.0742381113.

The spelling of 6975999 in words is "six million, nine hundred seventy-five thousand, nine hundred ninety-nine".