256072073 has 2 divisors, whose sum is σ = 256072074. Its totient is φ = 256072072.

The previous prime is 256072051. The next prime is 256072081. The reversal of 256072073 is 370270652.

It is a happy number.

256072073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229734649 + 26337424 = 15157^2 + 5132^2 .

It is a cyclic number.

It is not a de Polignac number, because 256072073 - 2¹⁴ = 256055689 is a prime.

It is not a weakly prime, because it can be changed into another prime (256072273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128036036 + 128036037.

It is an arithmetic number, because the mean of its divisors is an integer number (128036037).

Almost surely, 2^256072073 is an apocalyptic number.

It is an amenable number.

256072073 is a deficient number, since it is larger than the sum of its proper divisors (1).

256072073 is an equidigital number, since it uses as much as digits as its factorization.

256072073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 256072073 is about 16002.2521227482. The cubic root of 256072073 is about 635.0200030899.

The spelling of 256072073 in words is "two hundred fifty-six million, seventy-two thousand, seventy-three".