193989540351 has 4 divisors (see below), whose sum is σ = 258652720472. Its totient is φ = 129326360232.

The previous prime is 193989540301. The next prime is 193989540377. The reversal of 193989540351 is 153045989391.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 193989540351 - 2⁷ = 193989540223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 193989540291 and 193989540300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193989540301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32331590056 + ... + 32331590061.

It is an arithmetic number, because the mean of its divisors is an integer number (64663180118).

Almost surely, 2^193989540351 is an apocalyptic number.

193989540351 is a deficient number, since it is larger than the sum of its proper divisors (64663180121).

193989540351 is an equidigital number, since it uses as much as digits as its factorization.

193989540351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64663180120.

The product of its (nonzero) digits is 5248800, while the sum is 57.

The spelling of 193989540351 in words is "one hundred ninety-three billion, nine hundred eighty-nine million, five hundred forty thousand, three hundred fifty-one".