4256687917 has 2 divisors, whose sum is σ = 4256687918. Its totient is φ = 4256687916.

The previous prime is 4256687887. The next prime is 4256687969. The reversal of 4256687917 is 7197866524.

4256687917 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3847596841 + 409091076 = 62029^2 + 20226^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4256687917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4256657917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2128343958 + 2128343959.

It is an arithmetic number, because the mean of its divisors is an integer number (2128343959).

Almost surely, 2^4256687917 is an apocalyptic number.

It is an amenable number.

4256687917 is a deficient number, since it is larger than the sum of its proper divisors (1).

4256687917 is an equidigital number, since it uses as much as digits as its factorization.

4256687917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5080320, while the sum is 55.

The square root of 4256687917 is about 65243.2978703560. The cubic root of 4256687917 is about 1620.6551123992.

The spelling of 4256687917 in words is "four billion, two hundred fifty-six million, six hundred eighty-seven thousand, nine hundred seventeen".