256654003 has 4 divisors (see below), whose sum is σ = 256720320. Its totient is φ = 256587688.

The previous prime is 256653989. The next prime is 256654007. The reversal of 256654003 is 300456652.

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 256654003 - 2⁹ = 256653491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256654007) 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, 26968 + ... + 35221.

It is an arithmetic number, because the mean of its divisors is an integer number (64180080).

Almost surely, 2^256654003 is an apocalyptic number.

256654003 is a deficient number, since it is larger than the sum of its proper divisors (66317).

256654003 is an equidigital number, since it uses as much as digits as its factorization.

256654003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66316.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 256654003 is about 16020.4245574204. The cubic root of 256654003 is about 635.5006719520.

The spelling of 256654003 in words is "two hundred fifty-six million, six hundred fifty-four thousand, three".