256606673 has 2 divisors, whose sum is σ = 256606674. Its totient is φ = 256606672.

The previous prime is 256606667. The next prime is 256606697. The reversal of 256606673 is 376606652.

256606673 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., 254466304 + 2140369 = 15952^2 + 1463^2 .

It is a cyclic number.

It is not a de Polignac number, because 256606673 - 2²⁶ = 189497809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256606673.

It is not a weakly prime, because it can be changed into another prime (256606633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128303336 + 128303337.

It is an arithmetic number, because the mean of its divisors is an integer number (128303337).

Almost surely, 2^256606673 is an apocalyptic number.

It is an amenable number.

256606673 is a deficient number, since it is larger than the sum of its proper divisors (1).

256606673 is an equidigital number, since it uses as much as digits as its factorization.

256606673 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 41.

The square root of 256606673 is about 16018.9473124797. The cubic root of 256606673 is about 635.4616049649.

The spelling of 256606673 in words is "two hundred fifty-six million, six hundred six thousand, six hundred seventy-three".