257713783 has 2 divisors, whose sum is σ = 257713784. Its totient is φ = 257713782.

The previous prime is 257713751. The next prime is 257713787. The reversal of 257713783 is 387317752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257713783 - 2⁵ = 257713751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257713787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128856891 + 128856892.

It is an arithmetic number, because the mean of its divisors is an integer number (128856892).

Almost surely, 2^257713783 is an apocalyptic number.

257713783 is a deficient number, since it is larger than the sum of its proper divisors (1).

257713783 is an equidigital number, since it uses as much as digits as its factorization.

257713783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 246960, while the sum is 43.

The square root of 257713783 is about 16053.4663857997. The cubic root of 257713783 is about 636.3741774216.

The spelling of 257713783 in words is "two hundred fifty-seven million, seven hundred thirteen thousand, seven hundred eighty-three".