391378873193 has 8 divisors (see below), whose sum is σ = 487952880960. Its totient is φ = 304970550480.

The previous prime is 391378873187. The next prime is 391378873199.

391378873193 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (391378873187) and next prime (391378873199).

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 391378873193 - 2²⁸ = 391110437737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391378873199) 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, 2541421178 + ... + 2541421331.

It is an arithmetic number, because the mean of its divisors is an integer number (60994110120).

Almost surely, 2^391378873193 is an apocalyptic number.

It is an amenable number.

391378873193 is a deficient number, since it is larger than the sum of its proper divisors (96574007767).

391378873193 is a wasteful number, since it uses less digits than its factorization.

391378873193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5082842527.

The product of its digits is 20575296, while the sum is 62.

The spelling of 391378873193 in words is "three hundred ninety-one billion, three hundred seventy-eight million, eight hundred seventy-three thousand, one hundred ninety-three".