169000001 has 4 divisors (see below), whose sum is σ = 169040004. Its totient is φ = 168960000.

The previous prime is 168999997. The next prime is 169000033. The reversal of 169000001 is 100000961.

It is a Cunningham number, because it is equal to 13000²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100000961 = 29 ⋅3448309.

It can be written as a sum of positive squares in 2 ways, for example, as 97614400 + 71385601 = 9880^2 + 8449^2 .

It is a cyclic number.

It is not a de Polignac number, because 169000001 - 2² = 168999997 is a prime.

It is a super-2 number, since 2×169000001² = 57122000676000002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169000061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12800 + ... + 22401.

It is an arithmetic number, because the mean of its divisors is an integer number (42260001).

Almost surely, 2^169000001 is an apocalyptic number.

It is an amenable number.

169000001 is a deficient number, since it is larger than the sum of its proper divisors (40003).

169000001 is an equidigital number, since it uses as much as digits as its factorization.

169000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40002.

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

The square root of 169000001 is about 13000.0000384615. Note that the first 4 decimals coincide. The cubic root of 169000001 is about 552.8774824584.

Adding to 169000001 its reverse (100000961), we get a palindrome (269000962).

The spelling of 169000001 in words is "one hundred sixty-nine million, one", and thus it is an aban number.