551729 has 2 divisors, whose sum is σ = 551730. Its totient is φ = 551728.

The previous prime is 551723. The next prime is 551731. The reversal of 551729 is 927155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 409600 + 142129 = 640^2 + 377^2 .

It is a cyclic number.

It is not a de Polignac number, because 551729 - 2⁴ = 551713 is a prime.

Together with 551731, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (551723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275864 + 275865.

It is an arithmetic number, because the mean of its divisors is an integer number (275865).

2⁵⁵¹⁷²⁹ is an apocalyptic number.

It is an amenable number.

551729 is a deficient number, since it is larger than the sum of its proper divisors (1).

551729 is an equidigital number, since it uses as much as digits as its factorization.

551729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3150, while the sum is 29.

The square root of 551729 is about 742.7846255813. The cubic root of 551729 is about 82.0178921893.

The spelling of 551729 in words is "five hundred fifty-one thousand, seven hundred twenty-nine".