169748729 has 2 divisors, whose sum is σ = 169748730. Its totient is φ = 169748728.

The previous prime is 169748707. The next prime is 169748737. The reversal of 169748729 is 927847961.

169748729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164352400 + 5396329 = 12820^2 + 2323^2 .

It is an emirp because it is prime and its reverse (927847961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 169748729 - 2⁸ = 169748473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (169748749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84874364 + 84874365.

It is an arithmetic number, because the mean of its divisors is an integer number (84874365).

Almost surely, 2^169748729 is an apocalyptic number.

It is an amenable number.

169748729 is a deficient number, since it is larger than the sum of its proper divisors (1).

169748729 is an equidigital number, since it uses as much as digits as its factorization.

169748729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 53.

The square root of 169748729 is about 13028.7654442008. The cubic root of 169748729 is about 553.6927586492.

The spelling of 169748729 in words is "one hundred sixty-nine million, seven hundred forty-eight thousand, seven hundred twenty-nine".