501085891 has 8 divisors (see below), whose sum is σ = 517529600. Its totient is φ = 484659720.

The previous prime is 501085883. The next prime is 501085901. The reversal of 501085891 is 198580105.

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

It is a cyclic number.

It is not a de Polignac number, because 501085891 - 2³ = 501085883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 501085891.

It is not an unprimeable number, because it can be changed into a prime (501085811) 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, 79390 + ... + 85468.

It is an arithmetic number, because the mean of its divisors is an integer number (64691200).

Almost surely, 2^501085891 is an apocalyptic number.

501085891 is a deficient number, since it is larger than the sum of its proper divisors (16443709).

501085891 is a wasteful number, since it uses less digits than its factorization.

501085891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8769.

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 501085891 is about 22384.9478668144. The cubic root of 501085891 is about 794.2746920352.

The spelling of 501085891 in words is "five hundred one million, eighty-five thousand, eight hundred ninety-one".