257003322893 has 2 divisors, whose sum is σ = 257003322894. Its totient is φ = 257003322892.

The previous prime is 257003322869. The next prime is 257003322899. The reversal of 257003322893 is 398223300752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207355461769 + 49647861124 = 455363^2 + 222818^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257003322893 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257003322899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128501661446 + 128501661447.

It is an arithmetic number, because the mean of its divisors is an integer number (128501661447).

Almost surely, 2^257003322893 is an apocalyptic number.

It is an amenable number.

257003322893 is a deficient number, since it is larger than the sum of its proper divisors (1).

257003322893 is an equidigital number, since it uses as much as digits as its factorization.

257003322893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 44.

The spelling of 257003322893 in words is "two hundred fifty-seven billion, three million, three hundred twenty-two thousand, eight hundred ninety-three".