351689729 has 2 divisors, whose sum is σ = 351689730. Its totient is φ = 351689728.

The previous prime is 351689687. The next prime is 351689771. The reversal of 351689729 is 927986153.

It is a balanced prime because it is at equal distance from previous prime (351689687) and next prime (351689771).

It can be written as a sum of positive squares in only one way, i.e., 333610225 + 18079504 = 18265^2 + 4252^2 .

It is a cyclic number.

It is not a de Polignac number, because 351689729 - 2¹⁶ = 351624193 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (351689629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175844864 + 175844865.

It is an arithmetic number, because the mean of its divisors is an integer number (175844865).

Almost surely, 2^351689729 is an apocalyptic number.

It is an amenable number.

351689729 is a deficient number, since it is larger than the sum of its proper divisors (1).

351689729 is an equidigital number, since it uses as much as digits as its factorization.

351689729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 50.

The square root of 351689729 is about 18753.3924664312. The cubic root of 351689729 is about 705.8621506442.

The spelling of 351689729 in words is "three hundred fifty-one million, six hundred eighty-nine thousand, seven hundred twenty-nine".