517380019 has 4 divisors (see below), whose sum is σ = 557178496. Its totient is φ = 477581544.

The previous prime is 517380007. The next prime is 517380037. The reversal of 517380019 is 910083715.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-517380019 is a prime.

It is a super-2 number, since 2×517380019² = 535364168120880722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (517380079) 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, 19899219 + ... + 19899244.

It is an arithmetic number, because the mean of its divisors is an integer number (139294624).

Almost surely, 2^517380019 is an apocalyptic number.

517380019 is a deficient number, since it is larger than the sum of its proper divisors (39798477).

517380019 is a wasteful number, since it uses less digits than its factorization.

517380019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39798476.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 517380019 is about 22745.9890749996. The cubic root of 517380019 is about 802.7923354678.

The spelling of 517380019 in words is "five hundred seventeen million, three hundred eighty thousand, nineteen".