679883978 has 8 divisors (see below), whose sum is σ = 1021956480. Its totient is φ = 339231820.

The previous prime is 679883923. The next prime is 679883983. The reversal of 679883978 is 879388976.

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

It is a super-2 number, since 2×679883978² = 924484447082208968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353888 + ... + 355803.

It is an arithmetic number, because the mean of its divisors is an integer number (127744560).

Almost surely, 2^679883978 is an apocalyptic number.

679883978 is a deficient number, since it is larger than the sum of its proper divisors (342072502).

679883978 is a wasteful number, since it uses less digits than its factorization.

679883978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710172.

The product of its digits is 36578304, while the sum is 65.

The square root of 679883978 is about 26074.5849056126. The cubic root of 679883978 is about 879.3159189426.

The spelling of 679883978 in words is "six hundred seventy-nine million, eight hundred eighty-three thousand, nine hundred seventy-eight".