256004633 has 2 divisors, whose sum is σ = 256004634. Its totient is φ = 256004632.

The previous prime is 256004621. The next prime is 256004641. The reversal of 256004633 is 336400652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 236175424 + 19829209 = 15368^2 + 4453^2 .

It is a cyclic number.

It is not a de Polignac number, because 256004633 - 2⁶ = 256004569 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256004596 and 256004605.

It is not a weakly prime, because it can be changed into another prime (256004653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128002316 + 128002317.

It is an arithmetic number, because the mean of its divisors is an integer number (128002317).

Almost surely, 2^256004633 is an apocalyptic number.

It is an amenable number.

256004633 is a deficient number, since it is larger than the sum of its proper divisors (1).

256004633 is an equidigital number, since it uses as much as digits as its factorization.

256004633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 256004633 is about 16000.1447805950. The cubic root of 256004633 is about 634.9642511960.

The spelling of 256004633 in words is "two hundred fifty-six million, four thousand, six hundred thirty-three".