1161911437 has 2 divisors, whose sum is σ = 1161911438. Its totient is φ = 1161911436.

The previous prime is 1161911431. The next prime is 1161911441. The reversal of 1161911437 is 7341191611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1116294921 + 45616516 = 33411^2 + 6754^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161911437 - 2²³ = 1153522829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161911431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580955718 + 580955719.

It is an arithmetic number, because the mean of its divisors is an integer number (580955719).

Almost surely, 2^1161911437 is an apocalyptic number.

It is an amenable number.

1161911437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161911437 is an equidigital number, since it uses as much as digits as its factorization.

1161911437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 34.

The square root of 1161911437 is about 34086.8220431298. The cubic root of 1161911437 is about 1051.2943786156.

The spelling of 1161911437 in words is "one billion, one hundred sixty-one million, nine hundred eleven thousand, four hundred thirty-seven".