509714621 has 16 divisors (see below), whose sum is σ = 592192944. Its totient is φ = 434463744.

The previous prime is 509714603. The next prime is 509714641. The reversal of 509714621 is 126417905.

It can be written as a sum of positive squares in 8 ways, for example, as 49140100 + 460574521 = 7010^2 + 21461^2 .

It is a de Polignac number, because none of the positive numbers 2^k-509714621 is a prime.

It is a super-2 number, since 2×509714621² = 519617989722347282, 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 (509714641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10046 + ... + 33471.

It is an arithmetic number, because the mean of its divisors is an integer number (37012059).

Almost surely, 2^509714621 is an apocalyptic number.

It is an amenable number.

509714621 is a deficient number, since it is larger than the sum of its proper divisors (82478323).

509714621 is a wasteful number, since it uses less digits than its factorization.

509714621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43600.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 509714621 is about 22576.8602998734. The cubic root of 509714621 is about 798.8079230104.

The spelling of 509714621 in words is "five hundred nine million, seven hundred fourteen thousand, six hundred twenty-one".