517420447 has 4 divisors (see below), whose sum is σ = 517597576. Its totient is φ = 517243320.

The previous prime is 517420439. The next prime is 517420481. The reversal of 517420447 is 744024715.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 517420447 - 2³ = 517420439 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 (517420487) 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, 84108 + ... + 90049.

It is an arithmetic number, because the mean of its divisors is an integer number (129399394).

Almost surely, 2^517420447 is an apocalyptic number.

517420447 is a deficient number, since it is larger than the sum of its proper divisors (177129).

517420447 is a wasteful number, since it uses less digits than its factorization.

517420447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177128.

The product of its (nonzero) digits is 31360, while the sum is 34.

The square root of 517420447 is about 22746.8777417913. The cubic root of 517420447 is about 802.8132449489.

The spelling of 517420447 in words is "five hundred seventeen million, four hundred twenty thousand, four hundred forty-seven".