256479029 has 2 divisors, whose sum is σ = 256479030. Its totient is φ = 256479028.

The previous prime is 256479019. The next prime is 256479059. The reversal of 256479029 is 920974652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150430225 + 106048804 = 12265^2 + 10298^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256479029 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256479019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128239514 + 128239515.

It is an arithmetic number, because the mean of its divisors is an integer number (128239515).

Almost surely, 2^256479029 is an apocalyptic number.

It is an amenable number.

256479029 is a deficient number, since it is larger than the sum of its proper divisors (1).

256479029 is an equidigital number, since it uses as much as digits as its factorization.

256479029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 256479029 is about 16014.9626599627. The cubic root of 256479029 is about 635.3562214828.

The spelling of 256479029 in words is "two hundred fifty-six million, four hundred seventy-nine thousand, twenty-nine".