255634787 has 4 divisors (see below), whose sum is σ = 259967640. Its totient is φ = 251301936.

The previous prime is 255634781. The next prime is 255634817. The reversal of 255634787 is 787436552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 255634787 - 2¹⁴ = 255618403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255634781) 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 in 3 ways as a sum of consecutive naturals, for example, 2166338 + ... + 2166455.

It is an arithmetic number, because the mean of its divisors is an integer number (64991910).

Almost surely, 2^255634787 is an apocalyptic number.

255634787 is a deficient number, since it is larger than the sum of its proper divisors (4332853).

255634787 is an equidigital number, since it uses as much as digits as its factorization.

255634787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4332852.

The product of its digits is 1411200, while the sum is 47.

The square root of 255634787 is about 15988.5830203930. The cubic root of 255634787 is about 634.6583294294.

The spelling of 255634787 in words is "two hundred fifty-five million, six hundred thirty-four thousand, seven hundred eighty-seven".