256969429 has 2 divisors, whose sum is σ = 256969430. Its totient is φ = 256969428.

The previous prime is 256969421. The next prime is 256969441. The reversal of 256969429 is 924969652.

256969429 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 252746404 + 4223025 = 15898^2 + 2055^2 .

It is a cyclic number.

It is not a de Polignac number, because 256969429 - 2³ = 256969421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256969421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128484714 + 128484715.

It is an arithmetic number, because the mean of its divisors is an integer number (128484715).

Almost surely, 2^256969429 is an apocalyptic number.

It is an amenable number.

256969429 is a deficient number, since it is larger than the sum of its proper divisors (1).

256969429 is an equidigital number, since it uses as much as digits as its factorization.

256969429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2099520, while the sum is 52.

The square root of 256969429 is about 16030.2660302317. The cubic root of 256969429 is about 635.7609073533.

The spelling of 256969429 in words is "two hundred fifty-six million, nine hundred sixty-nine thousand, four hundred twenty-nine".