169000261 has 2 divisors, whose sum is σ = 169000262. Its totient is φ = 169000260.

The previous prime is 169000253. The next prime is 169000267. The reversal of 169000261 is 162000961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168350625 + 649636 = 12975^2 + 806^2 .

It is a cyclic number.

It is not a de Polignac number, because 169000261 - 2³ = 169000253 is a prime.

It is a super-2 number, since 2×169000261² = 57122176436136242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169000267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84500130 + 84500131.

It is an arithmetic number, because the mean of its divisors is an integer number (84500131).

Almost surely, 2^169000261 is an apocalyptic number.

It is an amenable number.

169000261 is a deficient number, since it is larger than the sum of its proper divisors (1).

169000261 is an equidigital number, since it uses as much as digits as its factorization.

169000261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 169000261 is about 13000.0100384577. The cubic root of 169000261 is about 552.8777659851.

The spelling of 169000261 in words is "one hundred sixty-nine million, two hundred sixty-one", and thus it is an aban number.