677998 has 4 divisors (see below), whose sum is σ = 1017000. Its totient is φ = 338998.

The previous prime is 677983. The next prime is 678023. The reversal of 677998 is 899776.

677998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

677998 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169498 + ... + 169501.

It is an arithmetic number, because the mean of its divisors is an integer number (254250).

2⁶⁷⁷⁹⁹⁸ is an apocalyptic number.

677998 is a deficient number, since it is larger than the sum of its proper divisors (339002).

677998 is a wasteful number, since it uses less digits than its factorization.

677998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339001.

The product of its digits is 190512, while the sum is 46.

The square root of 677998 is about 823.4063395432. The cubic root of 677998 is about 87.8502100545.

The spelling of 677998 in words is "six hundred seventy-seven thousand, nine hundred ninety-eight".