1189058989 has 2 divisors, whose sum is σ = 1189058990. Its totient is φ = 1189058988.

The previous prime is 1189058951. The next prime is 1189058993. The reversal of 1189058989 is 9898509811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1178754889 + 10304100 = 34333^2 + 3210^2 .

It is a cyclic number.

It is not a de Polignac number, because 1189058989 - 2⁹ = 1189058477 is a prime.

It is a super-2 number, since 2×1189058989² = 2827722558643404242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1189058089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594529494 + 594529495.

It is an arithmetic number, because the mean of its divisors is an integer number (594529495).

Almost surely, 2^1189058989 is an apocalyptic number.

It is an amenable number.

1189058989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1189058989 is an equidigital number, since it uses as much as digits as its factorization.

1189058989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 58.

The square root of 1189058989 is about 34482.7346508365. The cubic root of 1189058989 is about 1059.4191041108.

The spelling of 1189058989 in words is "one billion, one hundred eighty-nine million, fifty-eight thousand, nine hundred eighty-nine".