517158493 has 4 divisors (see below), whose sum is σ = 517351968. Its totient is φ = 516965020.

The previous prime is 517158491. The next prime is 517158517. The reversal of 517158493 is 394851715.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 517158493 - 2¹ = 517158491 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 (517158491) 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, 92671 + ... + 98092.

It is an arithmetic number, because the mean of its divisors is an integer number (129337992).

Almost surely, 2^517158493 is an apocalyptic number.

It is an amenable number.

517158493 is a deficient number, since it is larger than the sum of its proper divisors (193475).

517158493 is a wasteful number, since it uses less digits than its factorization.

517158493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193474.

The product of its digits is 151200, while the sum is 43.

The square root of 517158493 is about 22741.1189918174. The cubic root of 517158493 is about 802.6777422248.

The spelling of 517158493 in words is "five hundred seventeen million, one hundred fifty-eight thousand, four hundred ninety-three".