1121769161 has 2 divisors, whose sum is σ = 1121769162. Its totient is φ = 1121769160.

The previous prime is 1121769149. The next prime is 1121769197. The reversal of 1121769161 is 1619671211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1105163536 + 16605625 = 33244^2 + 4075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121769161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121763161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560884580 + 560884581.

It is an arithmetic number, because the mean of its divisors is an integer number (560884581).

Almost surely, 2^1121769161 is an apocalyptic number.

It is an amenable number.

1121769161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121769161 is an equidigital number, since it uses as much as digits as its factorization.

1121769161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 35.

The square root of 1121769161 is about 33492.8225296107. The cubic root of 1121769161 is about 1039.0453397363.

The spelling of 1121769161 in words is "one billion, one hundred twenty-one million, seven hundred sixty-nine thousand, one hundred sixty-one".