257045783 has 2 divisors, whose sum is σ = 257045784. Its totient is φ = 257045782.

The previous prime is 257045753. The next prime is 257045791. The reversal of 257045783 is 387540752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257045783 - 2⁸ = 257045527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 257045783.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257045743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128522891 + 128522892.

It is an arithmetic number, because the mean of its divisors is an integer number (128522892).

Almost surely, 2^257045783 is an apocalyptic number.

257045783 is a deficient number, since it is larger than the sum of its proper divisors (1).

257045783 is an equidigital number, since it uses as much as digits as its factorization.

257045783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 235200, while the sum is 41.

The square root of 257045783 is about 16032.6474108302. The cubic root of 257045783 is about 635.8238695526.

The spelling of 257045783 in words is "two hundred fifty-seven million, forty-five thousand, seven hundred eighty-three".