7984999 has 4 divisors (see below), whose sum is σ = 8710920. Its totient is φ = 7259080.

The previous prime is 7984957. The next prime is 7985009. The reversal of 7984999 is 9994897.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9994897 = 11 ⋅908627.

It is a cyclic number.

It is not a de Polignac number, because 7984999 - 2¹¹ = 7982951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7984939) 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, 362944 + ... + 362965.

It is an arithmetic number, because the mean of its divisors is an integer number (2177730).

Almost surely, 2^7984999 is an apocalyptic number.

7984999 is a deficient number, since it is larger than the sum of its proper divisors (725921).

7984999 is a wasteful number, since it uses less digits than its factorization.

7984999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725920.

The product of its digits is 1469664, while the sum is 55.

The square root of 7984999 is about 2825.7740532463. The cubic root of 7984999 is about 199.8749134498.

It can be divided in two parts, 79 and 84999, that added together give a triangular number (85078 = T₄₁₂).

The spelling of 7984999 in words is "seven million, nine hundred eighty-four thousand, nine hundred ninety-nine".