11989597 has 2 divisors, whose sum is σ = 11989598. Its totient is φ = 11989596.

The previous prime is 11989553. The next prime is 11989657. The reversal of 11989597 is 79598911.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11195716 + 793881 = 3346^2 + 891^2 .

It is a cyclic number.

It is not a de Polignac number, because 11989597 - 2⁷ = 11989469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11989597.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11989547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5994798 + 5994799.

It is an arithmetic number, because the mean of its divisors is an integer number (5994799).

Almost surely, 2^11989597 is an apocalyptic number.

It is an amenable number.

11989597 is a deficient number, since it is larger than the sum of its proper divisors (1).

11989597 is an equidigital number, since it uses as much as digits as its factorization.

11989597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 49.

The square root of 11989597 is about 3462.5997458557. The cubic root of 11989597 is about 228.8766712599.

The spelling of 11989597 in words is "eleven million, nine hundred eighty-nine thousand, five hundred ninety-seven".