257775473 has 2 divisors, whose sum is σ = 257775474. Its totient is φ = 257775472.

The previous prime is 257775449. The next prime is 257775521. The reversal of 257775473 is 374577752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 257538304 + 237169 = 16048^2 + 487^2 .

It is a cyclic number.

It is not a de Polignac number, because 257775473 - 2²² = 253581169 is a prime.

It is not a weakly prime, because it can be changed into another prime (257775433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128887736 + 128887737.

It is an arithmetic number, because the mean of its divisors is an integer number (128887737).

Almost surely, 2^257775473 is an apocalyptic number.

It is an amenable number.

257775473 is a deficient number, since it is larger than the sum of its proper divisors (1).

257775473 is an equidigital number, since it uses as much as digits as its factorization.

257775473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440600, while the sum is 47.

The square root of 257775473 is about 16055.3876627131. The cubic root of 257775473 is about 636.4249505318.

The spelling of 257775473 in words is "two hundred fifty-seven million, seven hundred seventy-five thousand, four hundred seventy-three".