257671763 has 2 divisors, whose sum is σ = 257671764. Its totient is φ = 257671762.

The previous prime is 257671751. The next prime is 257671789. The reversal of 257671763 is 367176752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257671763 - 2¹⁸ = 257409619 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (257671793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128835881 + 128835882.

It is an arithmetic number, because the mean of its divisors is an integer number (128835882).

Almost surely, 2^257671763 is an apocalyptic number.

257671763 is a deficient number, since it is larger than the sum of its proper divisors (1).

257671763 is an equidigital number, since it uses as much as digits as its factorization.

257671763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 370440, while the sum is 44.

The square root of 257671763 is about 16052.1575808363. The cubic root of 257671763 is about 636.3395887963.

It can be divided in two parts, 2576717 and 63, that multiplied together give a triangular number (162333171 = T₁₈₀₁₈).

The spelling of 257671763 in words is "two hundred fifty-seven million, six hundred seventy-one thousand, seven hundred sixty-three".