1189665479 has 2 divisors, whose sum is σ = 1189665480. Its totient is φ = 1189665478.

The previous prime is 1189665437. The next prime is 1189665481. The reversal of 1189665479 is 9745669811.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1189665479 is a prime.

It is a Sophie Germain prime.

Together with 1189665481, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1189605479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594832739 + 594832740.

It is an arithmetic number, because the mean of its divisors is an integer number (594832740).

Almost surely, 2^1189665479 is an apocalyptic number.

1189665479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1189665479 is an equidigital number, since it uses as much as digits as its factorization.

1189665479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 56.

The square root of 1189665479 is about 34491.5276408570. The cubic root of 1189665479 is about 1059.5991955072.

The spelling of 1189665479 in words is "one billion, one hundred eighty-nine million, six hundred sixty-five thousand, four hundred seventy-nine".