256306967 has 4 divisors (see below), whose sum is σ = 292922256. Its totient is φ = 219691680.

The previous prime is 256306937. The next prime is 256306997. The reversal of 256306967 is 769603652.

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

It is an interprime number because it is at equal distance from previous prime (256306937) and next prime (256306997).

It is a cyclic number.

It is not a de Polignac number, because 256306967 - 2¹⁰ = 256305943 is a prime.

It is a super-2 number, since 2×256306967² = 131386522665478178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256306937) 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, 18307634 + ... + 18307647.

It is an arithmetic number, because the mean of its divisors is an integer number (73230564).

Almost surely, 2^256306967 is an apocalyptic number.

256306967 is a deficient number, since it is larger than the sum of its proper divisors (36615289).

256306967 is an equidigital number, since it uses as much as digits as its factorization.

256306967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36615288.

The product of its (nonzero) digits is 408240, while the sum is 44.

The square root of 256306967 is about 16009.5898448399. The cubic root of 256306967 is about 635.2141109458.

The spelling of 256306967 in words is "two hundred fifty-six million, three hundred six thousand, nine hundred sixty-seven".