256671903 has 8 divisors (see below), whose sum is σ = 342903600. Its totient is φ = 170777408.

The previous prime is 256671871. The next prime is 256671907. The reversal of 256671903 is 309176652.

256671903 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 256671903 - 2⁵ = 256671871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256671907) 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, 82518 + ... + 85571.

It is an arithmetic number, because the mean of its divisors is an integer number (42862950).

Almost surely, 2^256671903 is an apocalyptic number.

256671903 is a deficient number, since it is larger than the sum of its proper divisors (86231697).

256671903 is a wasteful number, since it uses less digits than its factorization.

256671903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168601.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 256671903 is about 16020.9832095287. The cubic root of 256671903 is about 635.5154456648.

The spelling of 256671903 in words is "two hundred fifty-six million, six hundred seventy-one thousand, nine hundred three".