2009169 has 6 divisors (see below), whose sum is σ = 2902146. Its totient is φ = 1339440.

The previous prime is 2009167. The next prime is 2009171. The reversal of 2009169 is 9619002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2009167) and next prime (2009171).

It can be written as a sum of positive squares in only one way, i.e., 1468944 + 540225 = 1212^2 + 735^2 .

It is not a de Polignac number, because 2009169 - 2¹ = 2009167 is a prime.

It is a super-2 number, since 2×2009169² = 8073520141122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2009167) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111612 + ... + 111629.

It is an arithmetic number, because the mean of its divisors is an integer number (483691).

2^2009169 is an apocalyptic number.

It is an amenable number.

2009169 is a deficient number, since it is larger than the sum of its proper divisors (892977).

2009169 is a wasteful number, since it uses less digits than its factorization.

2009169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223247 (or 223244 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 2009169 is about 1417.4515864748. The cubic root of 2009169 is about 126.1843484432.

The spelling of 2009169 in words is "two million, nine thousand, one hundred sixty-nine".