256467787 has 2 divisors, whose sum is σ = 256467788. Its totient is φ = 256467786.

The previous prime is 256467707. The next prime is 256467839. The reversal of 256467787 is 787764652.

It is an a-pointer prime, because the next prime (256467839) can be obtained adding 256467787 to its sum of digits (52).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256467787 - 2¹¹ = 256465739 is a prime.

It is not a weakly prime, because it can be changed into another prime (256467707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128233893 + 128233894.

It is an arithmetic number, because the mean of its divisors is an integer number (128233894).

Almost surely, 2^256467787 is an apocalyptic number.

256467787 is a deficient number, since it is larger than the sum of its proper divisors (1).

256467787 is an equidigital number, since it uses as much as digits as its factorization.

256467787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3951360, while the sum is 52.

The square root of 256467787 is about 16014.6116718452. The cubic root of 256467787 is about 635.3469383600.

It can be divided in two parts, 25646 and 7787, that added together give a palindrome (33433).

The spelling of 256467787 in words is "two hundred fifty-six million, four hundred sixty-seven thousand, seven hundred eighty-seven".