391249482193 has 4 divisors (see below), whose sum is σ = 391362530868. Its totient is φ = 391136433520.

The previous prime is 391249482187. The next prime is 391249482203. The reversal of 391249482193 is 391284942193.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 391284942193 = 23 ⋅17012388791.

It can be written as a sum of positive squares in 2 ways, for example, as 253468950849 + 137780531344 = 503457^2 + 371188^2 .

It is a cyclic number.

It is not a de Polignac number, because 391249482193 - 2⁵ = 391249482161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391249483193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56519146 + ... + 56526067.

It is an arithmetic number, because the mean of its divisors is an integer number (97840632717).

Almost surely, 2^391249482193 is an apocalyptic number.

It is an amenable number.

391249482193 is a deficient number, since it is larger than the sum of its proper divisors (113048675).

391249482193 is a wasteful number, since it uses less digits than its factorization.

391249482193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113048674.

The product of its digits is 3359232, while the sum is 55.

The spelling of 391249482193 in words is "three hundred ninety-one billion, two hundred forty-nine million, four hundred eighty-two thousand, one hundred ninety-three".