256695423 has 16 divisors (see below), whose sum is σ = 351052416. Its totient is φ = 166753440.

The previous prime is 256695391. The next prime is 256695437. The reversal of 256695423 is 324596652.

It is a happy number.

It is not a de Polignac number, because 256695423 - 2⁵ = 256695391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256695463) 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 15 ways as a sum of consecutive naturals, for example, 58113 + ... + 62373.

It is an arithmetic number, because the mean of its divisors is an integer number (21940776).

Almost surely, 2^256695423 is an apocalyptic number.

256695423 is a deficient number, since it is larger than the sum of its proper divisors (94356993).

256695423 is a wasteful number, since it uses less digits than its factorization.

256695423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4774.

The product of its digits is 388800, while the sum is 42.

The square root of 256695423 is about 16021.7172300600. The cubic root of 256695423 is about 635.5348567841.

The spelling of 256695423 in words is "two hundred fifty-six million, six hundred ninety-five thousand, four hundred twenty-three".