1161323239 has 2 divisors, whose sum is σ = 1161323240. Its totient is φ = 1161323238.

The previous prime is 1161323203. The next prime is 1161323243. The reversal of 1161323239 is 9323231611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1161323239 - 2¹³ = 1161315047 is a prime.

It is a super-2 number, since 2×1161323239² = 2697343330882902242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1161323239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161323039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580661619 + 580661620.

It is an arithmetic number, because the mean of its divisors is an integer number (580661620).

Almost surely, 2^1161323239 is an apocalyptic number.

1161323239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161323239 is an equidigital number, since it uses as much as digits as its factorization.

1161323239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 31.

The square root of 1161323239 is about 34078.1930125410. The cubic root of 1161323239 is about 1051.1169486764.

The spelling of 1161323239 in words is "one billion, one hundred sixty-one million, three hundred twenty-three thousand, two hundred thirty-nine".