257143763 has 2 divisors, whose sum is σ = 257143764. Its totient is φ = 257143762.

The previous prime is 257143697. The next prime is 257143769. The reversal of 257143763 is 367341752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257143763 - 2¹⁴ = 257127379 is a prime.

It is a super-2 number, since 2×257143763² = 132245829699600338, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (257143769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128571881 + 128571882.

It is an arithmetic number, because the mean of its divisors is an integer number (128571882).

Almost surely, 2^257143763 is an apocalyptic number.

257143763 is a deficient number, since it is larger than the sum of its proper divisors (1).

257143763 is an equidigital number, since it uses as much as digits as its factorization.

257143763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 38.

The square root of 257143763 is about 16035.7027597795. The cubic root of 257143763 is about 635.9046464842.

The spelling of 257143763 in words is "two hundred fifty-seven million, one hundred forty-three thousand, seven hundred sixty-three".