161002169 has 2 divisors, whose sum is σ = 161002170. Its totient is φ = 161002168.

The previous prime is 161002123. The next prime is 161002199. The reversal of 161002169 is 961200161.

161002169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100240144 + 60762025 = 10012^2 + 7795^2 .

It is a cyclic number.

It is not a de Polignac number, because 161002169 - 2¹² = 160998073 is a prime.

It is a super-2 number, since 2×161002169² = 51843396845409122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161002199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80501084 + 80501085.

It is an arithmetic number, because the mean of its divisors is an integer number (80501085).

Almost surely, 2^161002169 is an apocalyptic number.

It is an amenable number.

161002169 is a deficient number, since it is larger than the sum of its proper divisors (1).

161002169 is an equidigital number, since it uses as much as digits as its factorization.

161002169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 161002169 is about 12688.6630107352. The cubic root of 161002169 is about 544.0146255169.

The spelling of 161002169 in words is "one hundred sixty-one million, two thousand, one hundred sixty-nine".