169728913 has 2 divisors, whose sum is σ = 169728914. Its totient is φ = 169728912.

The previous prime is 169728907. The next prime is 169728917. The reversal of 169728913 is 319827961.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137545984 + 32182929 = 11728^2 + 5673^2 .

It is a cyclic number.

It is not a de Polignac number, because 169728913 - 2¹³ = 169720721 is a prime.

It is not a weakly prime, because it can be changed into another prime (169728917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84864456 + 84864457.

It is an arithmetic number, because the mean of its divisors is an integer number (84864457).

Almost surely, 2^169728913 is an apocalyptic number.

It is an amenable number.

169728913 is a deficient number, since it is larger than the sum of its proper divisors (1).

169728913 is an equidigital number, since it uses as much as digits as its factorization.

169728913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 46.

The square root of 169728913 is about 13028.0049508741. The cubic root of 169728913 is about 553.6712122873.

The spelling of 169728913 in words is "one hundred sixty-nine million, seven hundred twenty-eight thousand, nine hundred thirteen".