257069429 has 2 divisors, whose sum is σ = 257069430. Its totient is φ = 257069428.

The previous prime is 257069389. The next prime is 257069441. The reversal of 257069429 is 924960752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252651025 + 4418404 = 15895^2 + 2102^2 .

It is a cyclic number.

It is not a de Polignac number, because 257069429 - 2⁸ = 257069173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 257069429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257069479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128534714 + 128534715.

It is an arithmetic number, because the mean of its divisors is an integer number (128534715).

Almost surely, 2^257069429 is an apocalyptic number.

It is an amenable number.

257069429 is a deficient number, since it is larger than the sum of its proper divisors (1).

257069429 is an equidigital number, since it uses as much as digits as its factorization.

257069429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 257069429 is about 16033.3848266671. The cubic root of 257069429 is about 635.8433657295.

The spelling of 257069429 in words is "two hundred fifty-seven million, sixty-nine thousand, four hundred twenty-nine".