169729 has 4 divisors (see below), whose sum is σ = 193984. Its totient is φ = 145476.

The previous prime is 169709. The next prime is 169733. The reversal of 169729 is 927961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 169729 - 2⁹ = 169217 is a prime.

169729 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 169694 and 169703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12117 + ... + 12130.

It is an arithmetic number, because the mean of its divisors is an integer number (48496).

2¹⁶⁹⁷²⁹ is an apocalyptic number.

It is an amenable number.

169729 is a deficient number, since it is larger than the sum of its proper divisors (24255).

169729 is an equidigital number, since it uses as much as digits as its factorization.

169729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24254.

The product of its digits is 6804, while the sum is 34.

The square root of 169729 is about 411.9817957143. The cubic root of 169729 is about 55.3671306888.

It can be divided in two parts, 169 and 729, that multiplied together give a square (123201 = 351²).

The spelling of 169729 in words is "one hundred sixty-nine thousand, seven hundred twenty-nine".