493228139 has 4 divisors (see below), whose sum is σ = 495009024. Its totient is φ = 491447256.

The previous prime is 493228129. The next prime is 493228159. The reversal of 493228139 is 931822394.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-493228139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 493228096 and 493228105.

It is not an unprimeable number, because it can be changed into a prime (493228129) 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, 890027 + ... + 890580.

It is an arithmetic number, because the mean of its divisors is an integer number (123752256).

Almost surely, 2^493228139 is an apocalyptic number.

493228139 is a deficient number, since it is larger than the sum of its proper divisors (1780885).

493228139 is a wasteful number, since it uses less digits than its factorization.

493228139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780884.

The product of its digits is 93312, while the sum is 41.

The square root of 493228139 is about 22208.7401488693. The cubic root of 493228139 is about 790.1010066866.

The spelling of 493228139 in words is "four hundred ninety-three million, two hundred twenty-eight thousand, one hundred thirty-nine".