256969829 has 4 divisors (see below), whose sum is σ = 257026476. Its totient is φ = 256913184.

The previous prime is 256969793. The next prime is 256969873. The reversal of 256969829 is 928969652.

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 223353025 + 33616804 = 14945^2 + 5798^2 .

It is a cyclic number.

It is not a de Polignac number, because 256969829 - 2¹⁶ = 256904293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256969429) 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, 20864 + ... + 30809.

It is an arithmetic number, because the mean of its divisors is an integer number (64256619).

Almost surely, 2^256969829 is an apocalyptic number.

It is an amenable number.

256969829 is a deficient number, since it is larger than the sum of its proper divisors (56647).

256969829 is an equidigital number, since it uses as much as digits as its factorization.

256969829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56646.

The product of its digits is 4199040, while the sum is 56.

The square root of 256969829 is about 16030.2785066261. The cubic root of 256969829 is about 635.7612372294.

The spelling of 256969829 in words is "two hundred fifty-six million, nine hundred sixty-nine thousand, eight hundred twenty-nine".