1189959971 has 2 divisors, whose sum is σ = 1189959972. Its totient is φ = 1189959970.

The previous prime is 1189959877. The next prime is 1189959977. The reversal of 1189959971 is 1799599811.

It is a strong prime.

It is an emirp because it is prime and its reverse (1799599811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1189959971 - 2¹⁰ = 1189958947 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1189959971.

It is not a weakly prime, because it can be changed into another prime (1189959977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594979985 + 594979986.

It is an arithmetic number, because the mean of its divisors is an integer number (594979986).

Almost surely, 2^1189959971 is an apocalyptic number.

1189959971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1189959971 is an equidigital number, since it uses as much as digits as its factorization.

1189959971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1837080, while the sum is 59.

The square root of 1189959971 is about 34495.7964250719. The cubic root of 1189959971 is about 1059.6866200108.

The spelling of 1189959971 in words is "one billion, one hundred eighty-nine million, nine hundred fifty-nine thousand, nine hundred seventy-one".