161173849 has 2 divisors, whose sum is σ = 161173850. Its totient is φ = 161173848.

The previous prime is 161173843. The next prime is 161173861. The reversal of 161173849 is 948371161.

161173849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111682624 + 49491225 = 10568^2 + 7035^2 .

It is a cyclic number.

It is not a de Polignac number, because 161173849 - 2³ = 161173841 is a prime.

It is not a weakly prime, because it can be changed into another prime (161173841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80586924 + 80586925.

It is an arithmetic number, because the mean of its divisors is an integer number (80586925).

Almost surely, 2^161173849 is an apocalyptic number.

It is an amenable number.

161173849 is a deficient number, since it is larger than the sum of its proper divisors (1).

161173849 is an equidigital number, since it uses as much as digits as its factorization.

161173849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 40.

The square root of 161173849 is about 12695.4263024130. The cubic root of 161173849 is about 544.2079215747.

The spelling of 161173849 in words is "one hundred sixty-one million, one hundred seventy-three thousand, eight hundred forty-nine".