11989553 has 2 divisors, whose sum is σ = 11989554. Its totient is φ = 11989552.

The previous prime is 11989547. The next prime is 11989597. The reversal of 11989553 is 35598911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11336689 + 652864 = 3367^2 + 808^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11989553 is a prime.

It is a super-2 number, since 2×11989553² = 287498762279618, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11989553.

It is not a weakly prime, because it can be changed into another prime (11989543) 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 as a sum of consecutive naturals, namely, 5994776 + 5994777.

It is an arithmetic number, because the mean of its divisors is an integer number (5994777).

Almost surely, 2^11989553 is an apocalyptic number.

It is an amenable number.

11989553 is a deficient number, since it is larger than the sum of its proper divisors (1).

11989553 is an equidigital number, since it uses as much as digits as its factorization.

11989553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 41.

The square root of 11989553 is about 3462.5933922423. The cubic root of 11989553 is about 228.8763912787.

The spelling of 11989553 in words is "eleven million, nine hundred eighty-nine thousand, five hundred fifty-three".