495438591 has 8 divisors (see below), whose sum is σ = 660694320. Its totient is φ = 330237632.

The previous prime is 495438577. The next prime is 495438631. The reversal of 495438591 is 195834594.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 495438591 - 2¹³ = 495430399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 495438591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495438511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17701 + ... + 36113.

It is an arithmetic number, because the mean of its divisors is an integer number (82586790).

Almost surely, 2^495438591 is an apocalyptic number.

495438591 is a deficient number, since it is larger than the sum of its proper divisors (165255729).

495438591 is a wasteful number, since it uses less digits than its factorization.

495438591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27385.

The product of its digits is 777600, while the sum is 48.

The square root of 495438591 is about 22258.4498786416. The cubic root of 495438591 is about 791.2795538128.

The spelling of 495438591 in words is "four hundred ninety-five million, four hundred thirty-eight thousand, five hundred ninety-one".