509306148917 has 4 divisors (see below), whose sum is σ = 509311090080. Its totient is φ = 509301207756.

The previous prime is 509306148907. The next prime is 509306149031. The reversal of 509306148917 is 719841603905.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 719841603905 = 5 ⋅143968320781.

It is a cyclic number.

It is not a de Polignac number, because 509306148917 - 2¹⁸ = 509305886773 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 (509306148907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2312603 + ... + 2523240.

It is an arithmetic number, because the mean of its divisors is an integer number (127327772520).

Almost surely, 2^509306148917 is an apocalyptic number.

It is an amenable number.

509306148917 is a deficient number, since it is larger than the sum of its proper divisors (4941163).

509306148917 is a wasteful number, since it uses less digits than its factorization.

509306148917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4941162.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 509306148917 in words is "five hundred nine billion, three hundred six million, one hundred forty-eight thousand, nine hundred seventeen".