1161173969 has 2 divisors, whose sum is σ = 1161173970. Its totient is φ = 1161173968.

The previous prime is 1161173957. The next prime is 1161173971. The reversal of 1161173969 is 9693711611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1122585025 + 38588944 = 33505^2 + 6212^2 .

It is an emirp because it is prime and its reverse (9693711611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1161173969 - 2⁴ = 1161173953 is a prime.

It is a super-2 number, since 2×1161173969² = 2696649972566425922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1161173971, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1161113969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580586984 + 580586985.

It is an arithmetic number, because the mean of its divisors is an integer number (580586985).

Almost surely, 2^1161173969 is an apocalyptic number.

It is an amenable number.

1161173969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161173969 is an equidigital number, since it uses as much as digits as its factorization.

1161173969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 44.

The square root of 1161173969 is about 34076.0028319050. The cubic root of 1161173969 is about 1051.0719118470.

The spelling of 1161173969 in words is "one billion, one hundred sixty-one million, one hundred seventy-three thousand, nine hundred sixty-nine".