256300403 has 2 divisors, whose sum is σ = 256300404. Its totient is φ = 256300402.

The previous prime is 256300399. The next prime is 256300423. The reversal of 256300403 is 304003652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256300403 - 2² = 256300399 is a prime.

It is not a weakly prime, because it can be changed into another prime (256300423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128150201 + 128150202.

It is an arithmetic number, because the mean of its divisors is an integer number (128150202).

Almost surely, 2^256300403 is an apocalyptic number.

256300403 is a deficient number, since it is larger than the sum of its proper divisors (1).

256300403 is an equidigital number, since it uses as much as digits as its factorization.

256300403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 256300403 is about 16009.3848413985. The cubic root of 256300403 is about 635.2086883060.

The spelling of 256300403 in words is "two hundred fifty-six million, three hundred thousand, four hundred three".