257429743 has 2 divisors, whose sum is σ = 257429744. Its totient is φ = 257429742.

The previous prime is 257429737. The next prime is 257429749. The reversal of 257429743 is 347924752.

It is a balanced prime because it is at equal distance from previous prime (257429737) and next prime (257429749).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257429743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 257429743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257429749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128714871 + 128714872.

It is an arithmetic number, because the mean of its divisors is an integer number (128714872).

Almost surely, 2^257429743 is an apocalyptic number.

257429743 is a deficient number, since it is larger than the sum of its proper divisors (1).

257429743 is an equidigital number, since it uses as much as digits as its factorization.

257429743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 43.

The square root of 257429743 is about 16044.6172593802. The cubic root of 257429743 is about 636.1402975895.

The spelling of 257429743 in words is "two hundred fifty-seven million, four hundred twenty-nine thousand, seven hundred forty-three".