517381693 has 4 divisors (see below), whose sum is σ = 531365020. Its totient is φ = 503398368.

The previous prime is 517381673. The next prime is 517381699. The reversal of 517381693 is 396183715.

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

It can be written as a sum of positive squares in 2 ways, for example, as 308810329 + 208571364 = 17573^2 + 14442^2 .

It is a cyclic number.

It is not a de Polignac number, because 517381693 - 2⁹ = 517381181 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 (517381699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6991608 + ... + 6991681.

It is an arithmetic number, because the mean of its divisors is an integer number (132841255).

Almost surely, 2^517381693 is an apocalyptic number.

It is an amenable number.

517381693 is a deficient number, since it is larger than the sum of its proper divisors (13983327).

517381693 is a wasteful number, since it uses less digits than its factorization.

517381693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13983326.

The product of its digits is 136080, while the sum is 43.

The square root of 517381693 is about 22746.0258726662. The cubic root of 517381693 is about 802.7932012871.

The spelling of 517381693 in words is "five hundred seventeen million, three hundred eighty-one thousand, six hundred ninety-three".