256682347 has 4 divisors (see below), whose sum is σ = 257232456. Its totient is φ = 256132240.

The previous prime is 256682341. The next prime is 256682359. The reversal of 256682347 is 743286652.

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 256682347 - 2²⁷ = 122464619 is a prime.

It is a super-2 number, since 2×256682347² = 131771654522856818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256682341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274354 + ... + 275287.

It is an arithmetic number, because the mean of its divisors is an integer number (64308114).

Almost surely, 2^256682347 is an apocalyptic number.

256682347 is a deficient number, since it is larger than the sum of its proper divisors (550109).

256682347 is an equidigital number, since it uses as much as digits as its factorization.

256682347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550108.

The product of its digits is 483840, while the sum is 43.

The square root of 256682347 is about 16021.3091537490. The cubic root of 256682347 is about 635.5240652725.

The spelling of 256682347 in words is "two hundred fifty-six million, six hundred eighty-two thousand, three hundred forty-seven".