968509 has 4 divisors (see below), whose sum is σ = 978016. Its totient is φ = 959004.

The previous prime is 968503. The next prime is 968519. The reversal of 968509 is 905869.

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: 905869 = 101 ⋅8969.

It is a cyclic number.

It is not a de Polignac number, because 968509 - 2³ = 968501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (968501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4599 + ... + 4804.

It is an arithmetic number, because the mean of its divisors is an integer number (244504).

2⁹⁶⁸⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

968509 is a deficient number, since it is larger than the sum of its proper divisors (9507).

968509 is a wasteful number, since it uses less digits than its factorization.

968509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9506.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 968509 is about 984.1285485139. The cubic root of 968509 is about 98.9390843841.

The spelling of 968509 in words is "nine hundred sixty-eight thousand, five hundred nine".