517869972 has 18 divisors (see below), whose sum is σ = 1309060298. Its totient is φ = 172623312.

The previous prime is 517869967. The next prime is 517869983. The reversal of 517869972 is 279968715.

It can be written as a sum of positive squares in only one way, i.e., 511935876 + 5934096 = 22626^2 + 2436^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7192603 + ... + 7192674.

Almost surely, 2^517869972 is an apocalyptic number.

It is an amenable number.

517869972 is an abundant number, since it is smaller than the sum of its proper divisors (791190326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

517869972 is a wasteful number, since it uses less digits than its factorization.

517869972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14385287 (or 14385282 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 54.

The square root of 517869972 is about 22756.7566230340. The cubic root of 517869972 is about 803.0456672575.

It can be divided in two parts, 517 and 869972, that added together give a square (870489 = 933²).

The spelling of 517869972 in words is "five hundred seventeen million, eight hundred sixty-nine thousand, nine hundred seventy-two".