1161729539 has 2 divisors, whose sum is σ = 1161729540. Its totient is φ = 1161729538.

The previous prime is 1161729533. The next prime is 1161729593. The reversal of 1161729539 is 9359271611.

Together with next prime (1161729593) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1161729539 - 2¹⁶ = 1161664003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1161729539.

It is not a weakly prime, because it can be changed into another prime (1161729533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580864769 + 580864770.

It is an arithmetic number, because the mean of its divisors is an integer number (580864770).

Almost surely, 2^1161729539 is an apocalyptic number.

1161729539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161729539 is an equidigital number, since it uses as much as digits as its factorization.

1161729539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 44.

The square root of 1161729539 is about 34084.1537814862. The cubic root of 1161729539 is about 1051.2395154769.

The spelling of 1161729539 in words is "one billion, one hundred sixty-one million, seven hundred twenty-nine thousand, five hundred thirty-nine".