1186874989 has 2 divisors, whose sum is σ = 1186874990. Its totient is φ = 1186874988.

The previous prime is 1186874971. The next prime is 1186875007. The reversal of 1186874989 is 9894786811.

It is a balanced prime because it is at equal distance from previous prime (1186874971) and next prime (1186875007).

It can be written as a sum of positive squares in only one way, i.e., 1110888900 + 75986089 = 33330^2 + 8717^2 .

It is a cyclic number.

It is not a de Polignac number, because 1186874989 - 2¹¹ = 1186872941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1186874389) 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, 593437494 + 593437495.

It is an arithmetic number, because the mean of its divisors is an integer number (593437495).

Almost surely, 2^1186874989 is an apocalyptic number.

It is an amenable number.

1186874989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1186874989 is an equidigital number, since it uses as much as digits as its factorization.

1186874989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6967296, while the sum is 61.

The square root of 1186874989 is about 34451.0520739208. The cubic root of 1186874989 is about 1058.7700784538.

The spelling of 1186874989 in words is "one billion, one hundred eighty-six million, eight hundred seventy-four thousand, nine hundred eighty-nine".