11631589 has 2 divisors, whose sum is σ = 11631590. Its totient is φ = 11631588.

The previous prime is 11631559. The next prime is 11631611. The reversal of 11631589 is 98513611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5919489 + 5712100 = 2433^2 + 2390^2 .

It is a cyclic number.

It is not a de Polignac number, because 11631589 - 2¹³ = 11623397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11631509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5815794 + 5815795.

It is an arithmetic number, because the mean of its divisors is an integer number (5815795).

Almost surely, 2^11631589 is an apocalyptic number.

It is an amenable number.

11631589 is a deficient number, since it is larger than the sum of its proper divisors (1).

11631589 is an equidigital number, since it uses as much as digits as its factorization.

11631589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 34.

The square root of 11631589 is about 3410.5115452084. The cubic root of 11631589 is about 226.5755359824.

The spelling of 11631589 in words is "eleven million, six hundred thirty-one thousand, five hundred eighty-nine".