1189889137 has 2 divisors, whose sum is σ = 1189889138. Its totient is φ = 1189889136.

The previous prime is 1189889033. The next prime is 1189889159. The reversal of 1189889137 is 7319889811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1145213281 + 44675856 = 33841^2 + 6684^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1189889137 is a prime.

It is not a weakly prime, because it can be changed into another prime (1189889737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594944568 + 594944569.

It is an arithmetic number, because the mean of its divisors is an integer number (594944569).

Almost surely, 2^1189889137 is an apocalyptic number.

It is an amenable number.

1189889137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1189889137 is an equidigital number, since it uses as much as digits as its factorization.

1189889137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 55.

The square root of 1189889137 is about 34494.7697049857. The cubic root of 1189889137 is about 1059.6655931602.

The spelling of 1189889137 in words is "one billion, one hundred eighty-nine million, eight hundred eighty-nine thousand, one hundred thirty-seven".