1165145939 has 2 divisors, whose sum is σ = 1165145940. Its totient is φ = 1165145938.

The previous prime is 1165145929. The next prime is 1165145981. The reversal of 1165145939 is 9395415611.

It is a weak prime.

It is an emirp because it is prime and its reverse (9395415611) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1165145939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1165145939.

It is not a weakly prime, because it can be changed into another prime (1165145929) 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, 582572969 + 582572970.

It is an arithmetic number, because the mean of its divisors is an integer number (582572970).

Almost surely, 2^1165145939 is an apocalyptic number.

1165145939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165145939 is an equidigital number, since it uses as much as digits as its factorization.

1165145939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 44.

The square root of 1165145939 is about 34134.2341206010. The cubic root of 1165145939 is about 1052.2689977365.

The spelling of 1165145939 in words is "one billion, one hundred sixty-five million, one hundred forty-five thousand, nine hundred thirty-nine".