289161 has 18 divisors (see below), whose sum is σ = 445770. Its totient is φ = 180576.

The previous prime is 289151. The next prime is 289169. The reversal of 289161 is 161982.

It can be written as a sum of positive squares in only one way, i.e., 207936 + 81225 = 456^2 + 285^2 .

It is not a de Polignac number, because 289161 - 2⁵ = 289129 is a prime.

It is a super-2 number, since 2×289161² = 167228167842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (289169) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3205 + ... + 3293.

It is an arithmetic number, because the mean of its divisors is an integer number (24765).

2²⁸⁹¹⁶¹ is an apocalyptic number.

It is an amenable number.

289161 is a deficient number, since it is larger than the sum of its proper divisors (156609).

289161 is a wasteful number, since it uses less digits than its factorization.

289161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 111 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 289161 is about 537.7369245272. The cubic root of 289161 is about 66.1271652956.

The spelling of 289161 in words is "two hundred eighty-nine thousand, one hundred sixty-one".