961589 has 4 divisors (see below), whose sum is σ = 992640. Its totient is φ = 930540.

The previous prime is 961567. The next prime is 961601. The reversal of 961589 is 985169.

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 a de Polignac number, because none of the positive numbers 2^k-961589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 961589.

It is not an unprimeable number, because it can be changed into a prime (961529) 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, 15479 + ... + 15540.

It is an arithmetic number, because the mean of its divisors is an integer number (248160).

2⁹⁶¹⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

961589 is a deficient number, since it is larger than the sum of its proper divisors (31051).

961589 is a wasteful number, since it uses less digits than its factorization.

961589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31050.

The product of its digits is 19440, while the sum is 38.

The square root of 961589 is about 980.6064450125. The cubic root of 961589 is about 98.7028809013.

The spelling of 961589 in words is "nine hundred sixty-one thousand, five hundred eighty-nine".