256793519 has 2 divisors, whose sum is σ = 256793520. Its totient is φ = 256793518.

The previous prime is 256793503. The next prime is 256793557. The reversal of 256793519 is 915397652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256793519 - 2⁴ = 256793503 is a prime.

It is a super-2 number, since 2×256793519² = 131885822800806722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256793219) 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 as a sum of consecutive naturals, namely, 128396759 + 128396760.

It is an arithmetic number, because the mean of its divisors is an integer number (128396760).

Almost surely, 2^256793519 is an apocalyptic number.

256793519 is a deficient number, since it is larger than the sum of its proper divisors (1).

256793519 is an equidigital number, since it uses as much as digits as its factorization.

256793519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 510300, while the sum is 47.

The square root of 256793519 is about 16024.7782823975. The cubic root of 256793519 is about 635.6158028936.

The spelling of 256793519 in words is "two hundred fifty-six million, seven hundred ninety-three thousand, five hundred nineteen".