8491365959 has 4 divisors (see below), whose sum is σ = 8497864104. Its totient is φ = 8484867816.

The previous prime is 8491365919. The next prime is 8491365977. The reversal of 8491365959 is 9595631948.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8491365959 - 2²⁰ = 8490317383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8491365898 and 8491365907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8491365919) 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, 3247112 + ... + 3249725.

It is an arithmetic number, because the mean of its divisors is an integer number (2124466026).

Almost surely, 2^8491365959 is an apocalyptic number.

8491365959 is a deficient number, since it is larger than the sum of its proper divisors (6498145).

8491365959 is a wasteful number, since it uses less digits than its factorization.

8491365959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6498144.

The product of its digits is 10497600, while the sum is 59.

The square root of 8491365959 is about 92148.6080144459. The cubic root of 8491365959 is about 2040.1363133794.

The spelling of 8491365959 in words is "eight billion, four hundred ninety-one million, three hundred sixty-five thousand, nine hundred fifty-nine".