662729 has 4 divisors (see below), whose sum is σ = 667920. Its totient is φ = 657540.

The previous prime is 662719. The next prime is 662743. The reversal of 662729 is 927266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 927266 = 2 ⋅463633.

It is a cyclic number.

It is not a de Polignac number, because 662729 - 2⁴ = 662713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 662695 and 662704.

It is not an unprimeable number, because it can be changed into a prime (662719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2399 + ... + 2660.

It is an arithmetic number, because the mean of its divisors is an integer number (166980).

2⁶⁶²⁷²⁹ is an apocalyptic number.

It is an amenable number.

662729 is a deficient number, since it is larger than the sum of its proper divisors (5191).

662729 is a wasteful number, since it uses less digits than its factorization.

662729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5190.

The product of its digits is 9072, while the sum is 32.

The square root of 662729 is about 814.0816912325. The cubic root of 662729 is about 87.1857132978.

The spelling of 662729 in words is "six hundred sixty-two thousand, seven hundred twenty-nine".