8736289 has 4 divisors (see below), whose sum is σ = 8799280. Its totient is φ = 8673300.

The previous prime is 8736263. The next prime is 8736323. The reversal of 8736289 is 9826378.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9826378 = 2 ⋅4913189.

It is a cyclic number.

It is not a de Polignac number, because 8736289 - 2⁹ = 8735777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8736209) 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, 31287 + ... + 31564.

It is an arithmetic number, because the mean of its divisors is an integer number (2199820).

Almost surely, 2^8736289 is an apocalyptic number.

It is an amenable number.

8736289 is a deficient number, since it is larger than the sum of its proper divisors (62991).

8736289 is a wasteful number, since it uses less digits than its factorization.

8736289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62990.

The product of its digits is 145152, while the sum is 43.

The square root of 8736289 is about 2955.7214009443. The cubic root of 8736289 is about 205.9565764506.

It can be divided in two parts, 8736 and 289, that added together give a square (9025 = 95²).

The spelling of 8736289 in words is "eight million, seven hundred thirty-six thousand, two hundred eighty-nine".