509779469 has 8 divisors (see below), whose sum is σ = 527050752. Its totient is φ = 492559920.

The previous prime is 509779447. The next prime is 509779477. The reversal of 509779469 is 964977905.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-509779469 is a prime.

It is a super-2 number, since 2×509779469² = 519750214027843922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509779489) 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, 7652 + ... + 32834.

It is an arithmetic number, because the mean of its divisors is an integer number (65881344).

Almost surely, 2^509779469 is an apocalyptic number.

It is an amenable number.

509779469 is a deficient number, since it is larger than the sum of its proper divisors (17271283).

509779469 is a wasteful number, since it uses less digits than its factorization.

509779469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25867.

The product of its (nonzero) digits is 4286520, while the sum is 56.

The square root of 509779469 is about 22578.2964149202. The cubic root of 509779469 is about 798.8417974553.

The spelling of 509779469 in words is "five hundred nine million, seven hundred seventy-nine thousand, four hundred sixty-nine".