256267783 has 2 divisors, whose sum is σ = 256267784. Its totient is φ = 256267782.

The previous prime is 256267769. The next prime is 256267787. The reversal of 256267783 is 387762652.

256267783 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256267783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256267787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128133891 + 128133892.

It is an arithmetic number, because the mean of its divisors is an integer number (128133892).

Almost surely, 2^256267783 is an apocalyptic number.

256267783 is a deficient number, since it is larger than the sum of its proper divisors (1).

256267783 is an equidigital number, since it uses as much as digits as its factorization.

256267783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 46.

The square root of 256267783 is about 16008.3660315474. The cubic root of 256267783 is about 635.1817389577.

The spelling of 256267783 in words is "two hundred fifty-six million, two hundred sixty-seven thousand, seven hundred eighty-three".