197313782539 has 4 divisors (see below), whose sum is σ = 197501522680. Its totient is φ = 197126042400.

The previous prime is 197313782527. The next prime is 197313782591. The reversal of 197313782539 is 935287313791.

197313782539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 935287313791 = 23 ⋅40664665817.

It is a cyclic number.

It is not a de Polignac number, because 197313782539 - 2⁹ = 197313782027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197313782509) 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 3 ways as a sum of consecutive naturals, for example, 93868494 + ... + 93870595.

It is an arithmetic number, because the mean of its divisors is an integer number (49375380670).

Almost surely, 2^197313782539 is an apocalyptic number.

197313782539 is a deficient number, since it is larger than the sum of its proper divisors (187740141).

197313782539 is a wasteful number, since it uses less digits than its factorization.

197313782539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187740140.

The product of its digits is 8573040, while the sum is 58.

The spelling of 197313782539 in words is "one hundred ninety-seven billion, three hundred thirteen million, seven hundred eighty-two thousand, five hundred thirty-nine".