509771247 has 8 divisors (see below), whose sum is σ = 679898544. Its totient is φ = 339745728.

The previous prime is 509771233. The next prime is 509771257. The reversal of 509771247 is 742177905.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 509771247 - 2²⁶ = 442662383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 509771199 and 509771208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509771257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12868 + ... + 34425.

It is an arithmetic number, because the mean of its divisors is an integer number (84987318).

Almost surely, 2^509771247 is an apocalyptic number.

509771247 is a deficient number, since it is larger than the sum of its proper divisors (170127297).

509771247 is a wasteful number, since it uses less digits than its factorization.

509771247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50889.

The product of its (nonzero) digits is 123480, while the sum is 42.

The square root of 509771247 is about 22578.1143366757. The cubic root of 509771247 is about 798.8375027141.

The spelling of 509771247 in words is "five hundred nine million, seven hundred seventy-one thousand, two hundred forty-seven".