626429 has 4 divisors (see below), whose sum is σ = 648060. Its totient is φ = 604800.

The previous prime is 626393. The next prime is 626443. The reversal of 626429 is 924626.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 458329 + 168100 = 677^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 626429 - 2⁸ = 626173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 21601 = 626429 / (6 + 2 + 6 + 4 + 2 + 9).

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 626429.

It is not an unprimeable number, because it can be changed into a prime (626489) 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 in 3 ways as a sum of consecutive naturals, for example, 10772 + ... + 10829.

It is an arithmetic number, because the mean of its divisors is an integer number (162015).

2⁶²⁶⁴²⁹ is an apocalyptic number.

It is an amenable number.

626429 is a deficient number, since it is larger than the sum of its proper divisors (21631).

626429 is a wasteful number, since it uses less digits than its factorization.

626429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21630.

The product of its digits is 5184, while the sum is 29.

The square root of 626429 is about 791.4726779871. The cubic root of 626429 is about 85.5639092185.

The spelling of 626429 in words is "six hundred twenty-six thousand, four hundred twenty-nine".