625729 has 8 divisors (see below), whose sum is σ = 680960. Its totient is φ = 571536.

The previous prime is 625699. The next prime is 625763. The reversal of 625729 is 927526.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 625729 - 2⁵ = 625697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 625729.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1462 + ... + 1840.

It is an arithmetic number, because the mean of its divisors is an integer number (85120).

2⁶²⁵⁷²⁹ is an apocalyptic number.

It is an amenable number.

625729 is a deficient number, since it is larger than the sum of its proper divisors (55231).

625729 is a wasteful number, since it uses less digits than its factorization.

625729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519.

The product of its digits is 7560, while the sum is 31.

The square root of 625729 is about 791.0303407582. The cubic root of 625729 is about 85.5320263501.

It can be divided in two parts, 625 and 729, that multiplied together give a square (455625 = 675²).

The spelling of 625729 in words is "six hundred twenty-five thousand, seven hundred twenty-nine".