979778 has 8 divisors (see below), whose sum is σ = 1556172. Its totient is φ = 461056.

The previous prime is 979757. The next prime is 979787. The reversal of 979778 is 877979.

It can be written as a sum of positive squares in 2 ways, for example, as 797449 + 182329 = 893^2 + 427^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14375 + ... + 14442.

2⁹⁷⁹⁷⁷⁸ is an apocalyptic number.

979778 is a deficient number, since it is larger than the sum of its proper divisors (576394).

979778 is a wasteful number, since it uses less digits than its factorization.

979778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28836.

The product of its digits is 222264, while the sum is 47.

The square root of 979778 is about 989.8373603780. The cubic root of 979778 is about 99.3213379306.

The spelling of 979778 in words is "nine hundred seventy-nine thousand, seven hundred seventy-eight".