1979680679 has 8 divisors (see below), whose sum is σ = 2136987360. Its totient is φ = 1828310176.

The previous prime is 1979680639. The next prime is 1979680721. The reversal of 1979680679 is 9760869791.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1979680679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1979680609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1483352 + ... + 1484685.

It is an arithmetic number, because the mean of its divisors is an integer number (267123420).

Almost surely, 2^1979680679 is an apocalyptic number.

1979680679 is a deficient number, since it is larger than the sum of its proper divisors (157306681).

1979680679 is a wasteful number, since it uses less digits than its factorization.

1979680679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2968089.

The product of its (nonzero) digits is 10287648, while the sum is 62.

The square root of 1979680679 is about 44493.6026749914. The cubic root of 1979680679 is about 1255.6397280265.

The spelling of 1979680679 in words is "one billion, nine hundred seventy-nine million, six hundred eighty thousand, six hundred seventy-nine".