256793479 has 2 divisors, whose sum is σ = 256793480. Its totient is φ = 256793478.

The previous prime is 256793443. The next prime is 256793497. The reversal of 256793479 is 974397652.

Together with next prime (256793497) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256793479 - 2⁹ = 256792967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256793179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128396739 + 128396740.

It is an arithmetic number, because the mean of its divisors is an integer number (128396740).

Almost surely, 2^256793479 is an apocalyptic number.

256793479 is a deficient number, since it is larger than the sum of its proper divisors (1).

256793479 is an equidigital number, since it uses as much as digits as its factorization.

256793479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2857680, while the sum is 52.

The square root of 256793479 is about 16024.7770343303. Note that the first 3 decimals coincide. The cubic root of 256793479 is about 635.6157698909.

The spelling of 256793479 in words is "two hundred fifty-six million, seven hundred ninety-three thousand, four hundred seventy-nine".