1161306943 has 4 divisors (see below), whose sum is σ = 1201352040. Its totient is φ = 1121261848.

The previous prime is 1161306929. The next prime is 1161306947. The reversal of 1161306943 is 3496031611.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161306943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1161306899 and 1161306908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161306947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20022505 + ... + 20022562.

It is an arithmetic number, because the mean of its divisors is an integer number (300338010).

Almost surely, 2^1161306943 is an apocalyptic number.

1161306943 is a deficient number, since it is larger than the sum of its proper divisors (40045097).

1161306943 is an equidigital number, since it uses as much as digits as its factorization.

1161306943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40045096.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 1161306943 is about 34077.9539145178. The cubic root of 1161306943 is about 1051.1120321349.

The spelling of 1161306943 in words is "one billion, one hundred sixty-one million, three hundred six thousand, nine hundred forty-three".