1188789949 has 2 divisors, whose sum is σ = 1188789950. Its totient is φ = 1188789948.

The previous prime is 1188789907. The next prime is 1188789961. The reversal of 1188789949 is 9499878811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1163287449 + 25502500 = 34107^2 + 5050^2 .

It is a cyclic number.

It is not a de Polignac number, because 1188789949 - 2²⁷ = 1054572221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1188789149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594394974 + 594394975.

It is an arithmetic number, because the mean of its divisors is an integer number (594394975).

Almost surely, 2^1188789949 is an apocalyptic number.

It is an amenable number.

1188789949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1188789949 is an equidigital number, since it uses as much as digits as its factorization.

1188789949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10450944, while the sum is 64.

The square root of 1188789949 is about 34478.8333474322. The cubic root of 1188789949 is about 1059.3391956515.

The spelling of 1188789949 in words is "one billion, one hundred eighty-eight million, seven hundred eighty-nine thousand, nine hundred forty-nine".