257043323 has 2 divisors, whose sum is σ = 257043324. Its totient is φ = 257043322.

The previous prime is 257043299. The next prime is 257043337. The reversal of 257043323 is 323340752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257043323 - 2⁸ = 257043067 is a prime.

It is not a weakly prime, because it can be changed into another prime (257043023) 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, 128521661 + 128521662.

It is an arithmetic number, because the mean of its divisors is an integer number (128521662).

Almost surely, 2^257043323 is an apocalyptic number.

257043323 is a deficient number, since it is larger than the sum of its proper divisors (1).

257043323 is an equidigital number, since it uses as much as digits as its factorization.

257043323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 29.

The square root of 257043323 is about 16032.5706921878. The cubic root of 257043323 is about 635.8218412087.

The spelling of 257043323 in words is "two hundred fifty-seven million, forty-three thousand, three hundred twenty-three".