679801980 has 96 divisors (see below), whose sum is σ = 2236243968. Its totient is φ = 152121600.

The previous prime is 679801979. The next prime is 679801981. The reversal of 679801980 is 89108976.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (679801979) and next prime (679801981).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679801981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31036 + ... + 48195.

It is an arithmetic number, because the mean of its divisors is an integer number (23294208).

Almost surely, 2^679801980 is an apocalyptic number.

679801980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

679801980 is an abundant number, since it is smaller than the sum of its proper divisors (1556441988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

679801980 is a wasteful number, since it uses less digits than its factorization.

679801980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79267 (or 79265 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 679801980 is about 26073.0124841760. The cubic root of 679801980 is about 879.2805673003.

The spelling of 679801980 in words is "six hundred seventy-nine million, eight hundred one thousand, nine hundred eighty".