188989531249 has 2 divisors, whose sum is σ = 188989531250. Its totient is φ = 188989531248.

The previous prime is 188989531229. The next prime is 188989531261. The reversal of 188989531249 is 942135989881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143110890000 + 45878641249 = 378300^2 + 214193^2 .

It is a cyclic number.

It is not a de Polignac number, because 188989531249 - 2³⁵ = 154629792881 is a prime.

It is not a weakly prime, because it can be changed into another prime (188989531219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94494765624 + 94494765625.

It is an arithmetic number, because the mean of its divisors is an integer number (94494765625).

Almost surely, 2^188989531249 is an apocalyptic number.

It is an amenable number.

188989531249 is a deficient number, since it is larger than the sum of its proper divisors (1).

188989531249 is an equidigital number, since it uses as much as digits as its factorization.

188989531249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44789760, while the sum is 67.

The spelling of 188989531249 in words is "one hundred eighty-eight billion, nine hundred eighty-nine million, five hundred thirty-one thousand, two hundred forty-nine".