979618139387 has 4 divisors (see below), whose sum is σ = 979647600360. Its totient is φ = 979588678416.

The previous prime is 979618139351. The next prime is 979618139407. The reversal of 979618139387 is 783931816979.

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

It is a cyclic number.

It is not a de Polignac number, because 979618139387 - 2⁸ = 979618139131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 979618139387.

It is not an unprimeable number, because it can be changed into a prime (979618139317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14680553 + ... + 14747130.

It is an arithmetic number, because the mean of its divisors is an integer number (244911900090).

Almost surely, 2^979618139387 is an apocalyptic number.

979618139387 is a deficient number, since it is larger than the sum of its proper divisors (29460973).

979618139387 is a wasteful number, since it uses less digits than its factorization.

979618139387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29460972.

The product of its digits is 123451776, while the sum is 71.

The spelling of 979618139387 in words is "nine hundred seventy-nine billion, six hundred eighteen million, one hundred thirty-nine thousand, three hundred eighty-seven".