492393191 has 4 divisors (see below), whose sum is σ = 494562552. Its totient is φ = 490223832.

The previous prime is 492393163. The next prime is 492393193. The reversal of 492393191 is 191393294.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 191393294 = 2 ⋅95696647.

It is a cyclic number.

It is not a de Polignac number, because 492393191 - 2⁶ = 492393127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (492393193) 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, 1084340 + ... + 1084793.

It is an arithmetic number, because the mean of its divisors is an integer number (123640638).

Almost surely, 2^492393191 is an apocalyptic number.

492393191 is a deficient number, since it is larger than the sum of its proper divisors (2169361).

492393191 is a wasteful number, since it uses less digits than its factorization.

492393191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2169360.

The product of its digits is 52488, while the sum is 41.

The square root of 492393191 is about 22189.9344523592. The cubic root of 492393191 is about 789.6549211253.

The spelling of 492393191 in words is "four hundred ninety-two million, three hundred ninety-three thousand, one hundred ninety-one".