508804861 has 4 divisors (see below), whose sum is σ = 510832224. Its totient is φ = 506777500.

The previous prime is 508804841. The next prime is 508804889. The reversal of 508804861 is 168408805.

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 508804861 - 2¹¹ = 508802813 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 (508804801) 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, 1013305 + ... + 1013806.

It is an arithmetic number, because the mean of its divisors is an integer number (127708056).

Almost surely, 2^508804861 is an apocalyptic number.

It is an amenable number.

508804861 is a deficient number, since it is larger than the sum of its proper divisors (2027363).

508804861 is a wasteful number, since it uses less digits than its factorization.

508804861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027362.

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 508804861 is about 22556.7032387271. The cubic root of 508804861 is about 798.3323913713.

The spelling of 508804861 in words is "five hundred eight million, eight hundred four thousand, eight hundred sixty-one".