979105143239 has 4 divisors (see below), whose sum is σ = 982253391600. Its totient is φ = 975956894880.

The previous prime is 979105143169. The next prime is 979105143241. The reversal of 979105143239 is 932341501979.

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 979105143239 - 2¹² = 979105139143 is a prime.

It is a super-2 number, since 2×979105143239² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979105133239) 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, 1574123714 + ... + 1574124335.

It is an arithmetic number, because the mean of its divisors is an integer number (245563347900).

Almost surely, 2^979105143239 is an apocalyptic number.

979105143239 is a deficient number, since it is larger than the sum of its proper divisors (3148248361).

979105143239 is a wasteful number, since it uses less digits than its factorization.

979105143239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3148248360.

The product of its (nonzero) digits is 1837080, while the sum is 53.

The spelling of 979105143239 in words is "nine hundred seventy-nine billion, one hundred five million, one hundred forty-three thousand, two hundred thirty-nine".