169513729 has 16 divisors (see below), whose sum is σ = 218632320. Its totient is φ = 127532160.

The previous prime is 169513723. The next prime is 169513739. The reversal of 169513729 is 927315961.

It is not a de Polignac number, because 169513729 - 2⁹ = 169513217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169513723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35724 + ... + 40189.

It is an arithmetic number, because the mean of its divisors is an integer number (13664520).

Almost surely, 2^169513729 is an apocalyptic number.

It is an amenable number.

169513729 is a deficient number, since it is larger than the sum of its proper divisors (49118591).

169513729 is a wasteful number, since it uses less digits than its factorization.

169513729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75960.

The product of its digits is 102060, while the sum is 43.

The square root of 169513729 is about 13019.7438146839. The cubic root of 169513729 is about 553.4371300499.

The spelling of 169513729 in words is "one hundred sixty-nine million, five hundred thirteen thousand, seven hundred twenty-nine".