1161995843 has 4 divisors (see below), whose sum is σ = 1163343168. Its totient is φ = 1160648520.

The previous prime is 1161995833. The next prime is 1161995881. The reversal of 1161995843 is 3485991611.

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

It is a cyclic number.

It is not a de Polignac number, because 1161995843 - 2⁴ = 1161995827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161995833) 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, 672368 + ... + 674093.

It is an arithmetic number, because the mean of its divisors is an integer number (290835792).

Almost surely, 2^1161995843 is an apocalyptic number.

1161995843 is a deficient number, since it is larger than the sum of its proper divisors (1347325).

1161995843 is an equidigital number, since it uses as much as digits as its factorization.

1161995843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347324.

The product of its digits is 233280, while the sum is 47.

The square root of 1161995843 is about 34088.0601237442. The cubic root of 1161995843 is about 1051.3198347739.

The spelling of 1161995843 in words is "one billion, one hundred sixty-one million, nine hundred ninety-five thousand, eight hundred forty-three".