256714687 has 8 divisors (see below), whose sum is σ = 266013440. Its totient is φ = 247567320.

The previous prime is 256714651. The next prime is 256714697. The reversal of 256714687 is 786417652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256714687 - 2¹¹ = 256712639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256714607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34389 + ... + 41182.

It is an arithmetic number, because the mean of its divisors is an integer number (33251680).

Almost surely, 2^256714687 is an apocalyptic number.

256714687 is a deficient number, since it is larger than the sum of its proper divisors (9298753).

256714687 is an equidigital number, since it uses as much as digits as its factorization.

256714687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75693.

The product of its digits is 564480, while the sum is 46.

The square root of 256714687 is about 16022.3184027780. The cubic root of 256714687 is about 635.5507545318.

The spelling of 256714687 in words is "two hundred fifty-six million, seven hundred fourteen thousand, six hundred eighty-seven".