517238689069 has 4 divisors (see below), whose sum is σ = 518720748700. Its totient is φ = 515756629440.

The previous prime is 517238689067. The next prime is 517238689109. The reversal of 517238689069 is 960986832715.

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 276218569225 + 241020119844 = 525565^2 + 490938^2 .

It is a cyclic number.

It is not a de Polignac number, because 517238689069 - 2¹ = 517238689067 is a prime.

It is a super-2 number, since 2×517238689069² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 517238689069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (517238689061) 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, 741029292 + ... + 741029989.

It is an arithmetic number, because the mean of its divisors is an integer number (129680187175).

Almost surely, 2^517238689069 is an apocalyptic number.

It is an amenable number.

517238689069 is a deficient number, since it is larger than the sum of its proper divisors (1482059631).

517238689069 is a wasteful number, since it uses less digits than its factorization.

517238689069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482059630.

The product of its (nonzero) digits is 39191040, while the sum is 64.

The spelling of 517238689069 in words is "five hundred seventeen billion, two hundred thirty-eight million, six hundred eighty-nine thousand, sixty-nine".