1161331069 has 2 divisors, whose sum is σ = 1161331070. Its totient is φ = 1161331068.

The previous prime is 1161331051. The next prime is 1161331079. The reversal of 1161331069 is 9601331611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 674025444 + 487305625 = 25962^2 + 22075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161331069 is a prime.

It is a super-2 number, since 2×1161331069² = 2697379703649365522, 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 1161331069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161331049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580665534 + 580665535.

It is an arithmetic number, because the mean of its divisors is an integer number (580665535).

Almost surely, 2^1161331069 is an apocalyptic number.

It is an amenable number.

1161331069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161331069 is an equidigital number, since it uses as much as digits as its factorization.

1161331069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 1161331069 is about 34078.3078951993. The cubic root of 1161331069 is about 1051.1193109895.

The spelling of 1161331069 in words is "one billion, one hundred sixty-one million, three hundred thirty-one thousand, sixty-nine".