169102081 has 8 divisors (see below), whose sum is σ = 173401704. Its totient is φ = 164810880.

The previous prime is 169102067. The next prime is 169102093. The reversal of 169102081 is 180201961.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3207681 + 165894400 = 1791^2 + 12880^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 169102081 - 2¹⁹ = 168577793 is a prime.

It is a super-2 number, since 2×169102081² = 57191027597061122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169102981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64855 + ... + 67411.

It is an arithmetic number, because the mean of its divisors is an integer number (21675213).

Almost surely, 2^169102081 is an apocalyptic number.

It is an amenable number.

169102081 is a deficient number, since it is larger than the sum of its proper divisors (4299623).

169102081 is a wasteful number, since it uses less digits than its factorization.

169102081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4211.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 169102081 is about 13003.9255996026. The cubic root of 169102081 is about 552.9887770809.

The spelling of 169102081 in words is "one hundred sixty-nine million, one hundred two thousand, eighty-one".