78943834987 has 8 divisors (see below), whose sum is σ = 79430011200. Its totient is φ = 78458958144.

The previous prime is 78943834919. The next prime is 78943834997.

78943834987 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 78943834987 - 2²³ = 78935446379 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78943834997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202818 + ... + 446119.

It is an arithmetic number, because the mean of its divisors is an integer number (9928751400).

Almost surely, 2^78943834987 is an apocalyptic number.

78943834987 is a deficient number, since it is larger than the sum of its proper divisors (486176213).

78943834987 is a wasteful number, since it uses less digits than its factorization.

78943834987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649685.

The product of its digits is 292626432, while the sum is 70.

The spelling of 78943834987 in words is "seventy-eight billion, nine hundred forty-three million, eight hundred thirty-four thousand, nine hundred eighty-seven".