493771391 has 4 divisors (see below), whose sum is σ = 498565392. Its totient is φ = 488977392.

The previous prime is 493771381. The next prime is 493771423. The reversal of 493771391 is 193177394.

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

It is a cyclic number.

It is not a de Polignac number, because 493771391 - 2¹⁰ = 493770367 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 (493771381) 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, 2396846 + ... + 2397051.

It is an arithmetic number, because the mean of its divisors is an integer number (124641348).

Almost surely, 2^493771391 is an apocalyptic number.

493771391 is a deficient number, since it is larger than the sum of its proper divisors (4794001).

493771391 is a wasteful number, since it uses less digits than its factorization.

493771391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4794000.

The product of its digits is 142884, while the sum is 44.

The square root of 493771391 is about 22220.9673731816. The cubic root of 493771391 is about 790.3909782901.

The spelling of 493771391 in words is "four hundred ninety-three million, seven hundred seventy-one thousand, three hundred ninety-one".