1249000189 has 2 divisors, whose sum is σ = 1249000190. Its totient is φ = 1249000188.

The previous prime is 1249000177. The next prime is 1249000223. The reversal of 1249000189 is 9810009421.

It is an a-pointer prime, because the next prime (1249000223) can be obtained adding 1249000189 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 678602500 + 570397689 = 26050^2 + 23883^2 .

It is a cyclic number.

It is not a de Polignac number, because 1249000189 - 2⁹ = 1248999677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1249000139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624500094 + 624500095.

It is an arithmetic number, because the mean of its divisors is an integer number (624500095).

Almost surely, 2^1249000189 is an apocalyptic number.

It is an amenable number.

1249000189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249000189 is an equidigital number, since it uses as much as digits as its factorization.

1249000189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 1249000189 is about 35341.1967680779. The cubic root of 1249000189 is about 1076.9300647418.

The spelling of 1249000189 in words is "one billion, two hundred forty-nine million, one hundred eighty-nine", and thus it is an aban number.