8513891 has 8 divisors (see below), whose sum is σ = 8750784. Its totient is φ = 8280360.

The previous prime is 8513863. The next prime is 8513893. The reversal of 8513891 is 1983158.

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 8513891 - 2¹⁴ = 8497507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8513893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4796 + ... + 6326.

It is an arithmetic number, because the mean of its divisors is an integer number (1093848).

Almost surely, 2^8513891 is an apocalyptic number.

8513891 is a deficient number, since it is larger than the sum of its proper divisors (236893).

8513891 is a wasteful number, since it uses less digits than its factorization.

8513891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681.

The product of its digits is 8640, while the sum is 35.

The square root of 8513891 is about 2917.8572617590. The cubic root of 8513891 is about 204.1938676702.

The spelling of 8513891 in words is "eight million, five hundred thirteen thousand, eight hundred ninety-one".