256743713 has 8 divisors (see below), whose sum is σ = 275356800. Its totient is φ = 238640688.

The previous prime is 256743709. The next prime is 256743727. The reversal of 256743713 is 317347652.

256743713 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 256743713 - 2² = 256743709 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256743743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126473 + ... + 128486.

It is an arithmetic number, because the mean of its divisors is an integer number (34419600).

Almost surely, 2^256743713 is an apocalyptic number.

It is an amenable number.

256743713 is a deficient number, since it is larger than the sum of its proper divisors (18613087).

256743713 is a wasteful number, since it uses less digits than its factorization.

256743713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255031.

The product of its digits is 105840, while the sum is 38.

The square root of 256743713 is about 16023.2241761763. The cubic root of 256743713 is about 635.5747069349.

The spelling of 256743713 in words is "two hundred fifty-six million, seven hundred forty-three thousand, seven hundred thirteen".