8491513 has 4 divisors (see below), whose sum is σ = 8618320. Its totient is φ = 8364708.

The previous prime is 8491507. The next prime is 8491541. The reversal of 8491513 is 3151948.

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 8491513 - 2⁹ = 8491001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8491543) 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 3 ways as a sum of consecutive naturals, for example, 63303 + ... + 63436.

It is an arithmetic number, because the mean of its divisors is an integer number (2154580).

Almost surely, 2^8491513 is an apocalyptic number.

It is an amenable number.

8491513 is a deficient number, since it is larger than the sum of its proper divisors (126807).

8491513 is a wasteful number, since it uses less digits than its factorization.

8491513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126806.

The product of its digits is 4320, while the sum is 31.

The square root of 8491513 is about 2914.0200754284. The cubic root of 8491513 is about 204.0148089339.

The spelling of 8491513 in words is "eight million, four hundred ninety-one thousand, five hundred thirteen".