169504081 has 4 divisors (see below), whose sum is σ = 169562932. Its totient is φ = 169445232.

The previous prime is 169504079. The next prime is 169504087. The reversal of 169504081 is 180405961.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 125081856 + 44422225 = 11184^2 + 6665^2 .

It is a cyclic number.

It is not a de Polignac number, because 169504081 - 2¹ = 169504079 is a prime.

It is a super-2 number, since 2×169504081² = 57463266951309122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169504087) 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 in 3 ways as a sum of consecutive naturals, for example, 24870 + ... + 30943.

It is an arithmetic number, because the mean of its divisors is an integer number (42390733).

Almost surely, 2^169504081 is an apocalyptic number.

It is an amenable number.

169504081 is a deficient number, since it is larger than the sum of its proper divisors (58851).

169504081 is an equidigital number, since it uses as much as digits as its factorization.

169504081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58850.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 169504081 is about 13019.3732952090. The cubic root of 169504081 is about 553.4266300887.

The spelling of 169504081 in words is "one hundred sixty-nine million, five hundred four thousand, eighty-one".