1165139827 has 2 divisors, whose sum is σ = 1165139828. Its totient is φ = 1165139826.

The previous prime is 1165139809. The next prime is 1165139893. The reversal of 1165139827 is 7289315611.

It is a weak prime.

It is an emirp because it is prime and its reverse (7289315611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1165139827 - 2¹⁹ = 1164615539 is a prime.

It is not a weakly prime, because it can be changed into another prime (1165136827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582569913 + 582569914.

It is an arithmetic number, because the mean of its divisors is an integer number (582569914).

Almost surely, 2^1165139827 is an apocalyptic number.

1165139827 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165139827 is an equidigital number, since it uses as much as digits as its factorization.

1165139827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 43.

The square root of 1165139827 is about 34134.1445915963. The cubic root of 1165139827 is about 1052.2671577727.

The spelling of 1165139827 in words is "one billion, one hundred sixty-five million, one hundred thirty-nine thousand, eight hundred twenty-seven".