256732843 has 2 divisors, whose sum is σ = 256732844. Its totient is φ = 256732842.

The previous prime is 256732829. The next prime is 256732867. The reversal of 256732843 is 348237652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256732843 - 2¹³ = 256724651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256732796 and 256732805.

It is not a weakly prime, because it can be changed into another prime (256732813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128366421 + 128366422.

It is an arithmetic number, because the mean of its divisors is an integer number (128366422).

Almost surely, 2^256732843 is an apocalyptic number.

256732843 is a deficient number, since it is larger than the sum of its proper divisors (1).

256732843 is an equidigital number, since it uses as much as digits as its factorization.

256732843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 40.

The square root of 256732843 is about 16022.8849774315. The cubic root of 256732843 is about 635.5657371669.

The spelling of 256732843 in words is "two hundred fifty-six million, seven hundred thirty-two thousand, eight hundred forty-three".