978343343879 has 16 divisors (see below), whose sum is σ = 1124403223680. Its totient is φ = 841882289760.

The previous prime is 978343343839. The next prime is 978343343891.

978343343879 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978343343879 is a prime.

It is a super-3 number, since 3×978343343879³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978343343839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1723724 + ... + 2219889.

It is an arithmetic number, because the mean of its divisors is an integer number (70275201480).

Almost surely, 2^978343343879 is an apocalyptic number.

978343343879 is a deficient number, since it is larger than the sum of its proper divisors (146059879801).

978343343879 is a wasteful number, since it uses less digits than its factorization.

978343343879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3944830.

The product of its digits is 329204736, while the sum is 68.

The spelling of 978343343879 in words is "nine hundred seventy-eight billion, three hundred forty-three million, three hundred forty-three thousand, eight hundred seventy-nine".