629729 has 4 divisors (see below), whose sum is σ = 632340. Its totient is φ = 627120.

The previous prime is 629723. The next prime is 629737. The reversal of 629729 is 927926.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 927926 = 2 ⋅463963.

It can be written as a sum of positive squares in 2 ways, for example, as 200704 + 429025 = 448^2 + 655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-629729 is a prime.

It is a super-2 number, since 2×629729² = 793117226882, which contains 22 as substring.

It is a d-powerful number, because it can be written as 6⁶ + 2¹¹ + 7⁵ + 9 + 2¹⁵ + 9⁶ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (629723) 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 in 3 ways as a sum of consecutive naturals, for example, 902 + ... + 1439.

It is an arithmetic number, because the mean of its divisors is an integer number (158085).

2⁶²⁹⁷²⁹ is an apocalyptic number.

It is an amenable number.

629729 is a deficient number, since it is larger than the sum of its proper divisors (2611).

629729 is a wasteful number, since it uses less digits than its factorization.

629729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2610.

The product of its digits is 13608, while the sum is 35.

The square root of 629729 is about 793.5546610033. The cubic root of 629729 is about 85.7138951040.

The spelling of 629729 in words is "six hundred twenty-nine thousand, seven hundred twenty-nine".