1199458889 has 2 divisors, whose sum is σ = 1199458890. Its totient is φ = 1199458888.

The previous prime is 1199458873. The next prime is 1199458907. The reversal of 1199458889 is 9888549911.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 834343225 + 365115664 = 28885^2 + 19108^2 .

It is a cyclic number.

It is not a de Polignac number, because 1199458889 - 2⁴ = 1199458873 is a prime.

It is a super-2 number, since 2×1199458889² = 2877403252802228642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1199458289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599729444 + 599729445.

It is an arithmetic number, because the mean of its divisors is an integer number (599729445).

Almost surely, 2^1199458889 is an apocalyptic number.

It is an amenable number.

1199458889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1199458889 is an equidigital number, since it uses as much as digits as its factorization.

1199458889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7464960, while the sum is 62.

The square root of 1199458889 is about 34633.2050061787. The cubic root of 1199458889 is about 1062.4988184347.

The spelling of 1199458889 in words is "one billion, one hundred ninety-nine million, four hundred fifty-eight thousand, eight hundred eighty-nine".