257612273 has 2 divisors, whose sum is σ = 257612274. Its totient is φ = 257612272.

The previous prime is 257612239. The next prime is 257612281. The reversal of 257612273 is 372216752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186513649 + 71098624 = 13657^2 + 8432^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257612273 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (257615273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128806136 + 128806137.

It is an arithmetic number, because the mean of its divisors is an integer number (128806137).

Almost surely, 2^257612273 is an apocalyptic number.

It is an amenable number.

257612273 is a deficient number, since it is larger than the sum of its proper divisors (1).

257612273 is an equidigital number, since it uses as much as digits as its factorization.

257612273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 35.

The square root of 257612273 is about 16050.3044519411. The cubic root of 257612273 is about 636.2906133667.

The spelling of 257612273 in words is "two hundred fifty-seven million, six hundred twelve thousand, two hundred seventy-three".