509806061 has 4 divisors (see below), whose sum is σ = 509932800. Its totient is φ = 509679324.

The previous prime is 509806027. The next prime is 509806069. The reversal of 509806061 is 160608905.

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.

It is a cyclic number.

It is not a de Polignac number, because 509806061 - 2⁶ = 509805997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509806069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57131 + ... + 65448.

It is an arithmetic number, because the mean of its divisors is an integer number (127483200).

Almost surely, 2^509806061 is an apocalyptic number.

It is an amenable number.

509806061 is a deficient number, since it is larger than the sum of its proper divisors (126739).

509806061 is a wasteful number, since it uses less digits than its factorization.

509806061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126738.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 509806061 is about 22578.8852913513. The cubic root of 509806061 is about 798.8556874038.

The spelling of 509806061 in words is "five hundred nine million, eight hundred six thousand, sixty-one".