6879998 has 4 divisors (see below), whose sum is σ = 10320000. Its totient is φ = 3439998.

The previous prime is 6879997. The next prime is 6880009. The reversal of 6879998 is 8999786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8999786 = 2 ⋅4499893.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6879997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1719998 + ... + 1720001.

It is an arithmetic number, because the mean of its divisors is an integer number (2580000).

Almost surely, 2^6879998 is an apocalyptic number.

6879998 is a deficient number, since it is larger than the sum of its proper divisors (3440002).

6879998 is a wasteful number, since it uses less digits than its factorization.

6879998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3440001.

The product of its digits is 1959552, while the sum is 56.

The square root of 6879998 is about 2622.9750284743. The cubic root of 6879998 is about 190.1936898315.

The spelling of 6879998 in words is "six million, eight hundred seventy-nine thousand, nine hundred ninety-eight".