900161 has 2 divisors, whose sum is σ = 900162. Its totient is φ = 900160.

The previous prime is 900157. The next prime is 900169. The reversal of 900161 is 161009.

900161 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., 891136 + 9025 = 944^2 + 95^2 .

It is an emirp because it is prime and its reverse (161009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 900161 - 2² = 900157 is a prime.

It is not a weakly prime, because it can be changed into another prime (900169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450080 + 450081.

It is an arithmetic number, because the mean of its divisors is an integer number (450081).

2⁹⁰⁰¹⁶¹ is an apocalyptic number.

It is an amenable number.

900161 is a deficient number, since it is larger than the sum of its proper divisors (1).

900161 is an equidigital number, since it uses as much as digits as its factorization.

900161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 900161 is about 948.7681487065. The cubic root of 900161 is about 96.5546952947.

The spelling of 900161 in words is "nine hundred thousand, one hundred sixty-one".