779998 has 4 divisors (see below), whose sum is σ = 1170000. Its totient is φ = 389998.

The previous prime is 779993. The next prime is 780029. The reversal of 779998 is 899977.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (779993) by changing a digit.

779998 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, 194998 + ... + 195001.

It is an arithmetic number, because the mean of its divisors is an integer number (292500).

2⁷⁷⁹⁹⁹⁸ is an apocalyptic number.

779998 is a deficient number, since it is larger than the sum of its proper divisors (390002).

779998 is a wasteful number, since it uses less digits than its factorization.

779998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390001.

The product of its digits is 285768, while the sum is 49.

The square root of 779998 is about 883.1749543550. The cubic root of 779998 is about 92.0515621485.

The spelling of 779998 in words is "seven hundred seventy-nine thousand, nine hundred ninety-eight".