6851998 has 4 divisors (see below), whose sum is σ = 10278000. Its totient is φ = 3425998.

The previous prime is 6851987. The next prime is 6852019. The reversal of 6851998 is 8991586.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1712998 + ... + 1713001.

It is an arithmetic number, because the mean of its divisors is an integer number (2569500).

Almost surely, 2^6851998 is an apocalyptic number.

6851998 is a deficient number, since it is larger than the sum of its proper divisors (3426002).

6851998 is a wasteful number, since it uses less digits than its factorization.

6851998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3426001.

The product of its digits is 155520, while the sum is 46.

The square root of 6851998 is about 2617.6321361108. The cubic root of 6851998 is about 189.9353242473.

The spelling of 6851998 in words is "six million, eight hundred fifty-one thousand, nine hundred ninety-eight".