493508391 has 16 divisors (see below), whose sum is σ = 670101120. Its totient is φ = 322976480.

The previous prime is 493508383. The next prime is 493508423. The reversal of 493508391 is 193805394.

It is a cyclic number.

It is not a de Polignac number, because 493508391 - 2³ = 493508383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493508311) 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 15 ways as a sum of consecutive naturals, for example, 165076 + ... + 168038.

It is an arithmetic number, because the mean of its divisors is an integer number (41881320).

Almost surely, 2^493508391 is an apocalyptic number.

493508391 is a deficient number, since it is larger than the sum of its proper divisors (176592729).

493508391 is a wasteful number, since it uses less digits than its factorization.

493508391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3966.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 493508391 is about 22215.0487507905. The cubic root of 493508391 is about 790.2506233615.

The spelling of 493508391 in words is "four hundred ninety-three million, five hundred eight thousand, three hundred ninety-one".