336521729 has 2 divisors, whose sum is σ = 336521730. Its totient is φ = 336521728.

The previous prime is 336521723. The next prime is 336521747. The reversal of 336521729 is 927125633.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183331600 + 153190129 = 13540^2 + 12377^2 .

It is a cyclic number.

It is not a de Polignac number, because 336521729 - 2²⁰ = 335473153 is a prime.

It is a super-2 number, since 2×336521729² = 226493748178298882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 336521692 and 336521701.

It is not a weakly prime, because it can be changed into another prime (336521723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168260864 + 168260865.

It is an arithmetic number, because the mean of its divisors is an integer number (168260865).

Almost surely, 2^336521729 is an apocalyptic number.

It is an amenable number.

336521729 is a deficient number, since it is larger than the sum of its proper divisors (1).

336521729 is an equidigital number, since it uses as much as digits as its factorization.

336521729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 38.

The square root of 336521729 is about 18344.5285848397. The cubic root of 336521729 is about 695.5649730339.

The spelling of 336521729 in words is "three hundred thirty-six million, five hundred twenty-one thousand, seven hundred twenty-nine".