9161361137 has 2 divisors, whose sum is σ = 9161361138. Its totient is φ = 9161361136.

The previous prime is 9161361109. The next prime is 9161361257. The reversal of 9161361137 is 7311631619.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7452696241 + 1708664896 = 86329^2 + 41336^2 .

It is an emirp because it is prime and its reverse (7311631619) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9161361137 - 2⁸ = 9161360881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9161361137.

It is not a weakly prime, because it can be changed into another prime (9161361107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4580680568 + 4580680569.

It is an arithmetic number, because the mean of its divisors is an integer number (4580680569).

Almost surely, 2^9161361137 is an apocalyptic number.

It is an amenable number.

9161361137 is a deficient number, since it is larger than the sum of its proper divisors (1).

9161361137 is an equidigital number, since it uses as much as digits as its factorization.

9161361137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 38.

The square root of 9161361137 is about 95714.9995403019. Note that the first 3 decimals coincide. The cubic root of 9161361137 is about 2092.4415456046.

The spelling of 9161361137 in words is "nine billion, one hundred sixty-one million, three hundred sixty-one thousand, one hundred thirty-seven".