256603093 has 2 divisors, whose sum is σ = 256603094. Its totient is φ = 256603092.

The previous prime is 256603079. The next prime is 256603129. The reversal of 256603093 is 390306652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 248440644 + 8162449 = 15762^2 + 2857^2 .

It is a cyclic number.

It is not a de Polignac number, because 256603093 - 2¹³ = 256594901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256603003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128301546 + 128301547.

It is an arithmetic number, because the mean of its divisors is an integer number (128301547).

Almost surely, 2^256603093 is an apocalyptic number.

It is an amenable number.

256603093 is a deficient number, since it is larger than the sum of its proper divisors (1).

256603093 is an equidigital number, since it uses as much as digits as its factorization.

256603093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 34.

The square root of 256603093 is about 16018.8355694164. The cubic root of 256603093 is about 635.4586497765.

The spelling of 256603093 in words is "two hundred fifty-six million, six hundred three thousand, ninety-three".