161140117 has 2 divisors, whose sum is σ = 161140118. Its totient is φ = 161140116.

The previous prime is 161140097. The next prime is 161140163. The reversal of 161140117 is 711041161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158608836 + 2531281 = 12594^2 + 1591^2 .

It is a cyclic number.

It is not a de Polignac number, because 161140117 - 2²³ = 152751509 is a prime.

It is a super-2 number, since 2×161140117² = 51932274613547378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161140417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80570058 + 80570059.

It is an arithmetic number, because the mean of its divisors is an integer number (80570059).

Almost surely, 2^161140117 is an apocalyptic number.

It is an amenable number.

161140117 is a deficient number, since it is larger than the sum of its proper divisors (1).

161140117 is an equidigital number, since it uses as much as digits as its factorization.

161140117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 22.

The square root of 161140117 is about 12694.0977229577. The cubic root of 161140117 is about 544.1699532514.

Adding to 161140117 its reverse (711041161), we get a palindrome (872181278).

The spelling of 161140117 in words is "one hundred sixty-one million, one hundred forty thousand, one hundred seventeen".