656429 has 2 divisors, whose sum is σ = 656430. Its totient is φ = 656428.

The previous prime is 656423. The next prime is 656459. The reversal of 656429 is 924656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 643204 + 13225 = 802^2 + 115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656429 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 656395 and 656404.

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 656429.

It is not a weakly prime, because it can be changed into another prime (656423) 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 as a sum of consecutive naturals, namely, 328214 + 328215.

It is an arithmetic number, because the mean of its divisors is an integer number (328215).

2⁶⁵⁶⁴²⁹ is an apocalyptic number.

It is an amenable number.

656429 is a deficient number, since it is larger than the sum of its proper divisors (1).

656429 is an equidigital number, since it uses as much as digits as its factorization.

656429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 32.

The square root of 656429 is about 810.2030609668. The cubic root of 656429 is about 86.9085664676.

The spelling of 656429 in words is "six hundred fifty-six thousand, four hundred twenty-nine".