161177129 has 2 divisors, whose sum is σ = 161177130. Its totient is φ = 161177128.

The previous prime is 161177087. The next prime is 161177141. The reversal of 161177129 is 921771161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107081104 + 54096025 = 10348^2 + 7355^2 .

It is a cyclic number.

It is not a de Polignac number, because 161177129 - 2¹⁶ = 161111593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161177179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80588564 + 80588565.

It is an arithmetic number, because the mean of its divisors is an integer number (80588565).

Almost surely, 2^161177129 is an apocalyptic number.

It is an amenable number.

161177129 is a deficient number, since it is larger than the sum of its proper divisors (1).

161177129 is an equidigital number, since it uses as much as digits as its factorization.

161177129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5292, while the sum is 35.

The square root of 161177129 is about 12695.5554821363. Note that the first 3 decimals coincide. The cubic root of 161177129 is about 544.2116132197.

The spelling of 161177129 in words is "one hundred sixty-one million, one hundred seventy-seven thousand, one hundred twenty-nine".