257967373 has 2 divisors, whose sum is σ = 257967374. Its totient is φ = 257967372.

The previous prime is 257967257. The next prime is 257967397. The reversal of 257967373 is 373769752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151733124 + 106234249 = 12318^2 + 10307^2 .

It is a cyclic number.

It is not a de Polignac number, because 257967373 - 2²¹ = 255870221 is a prime.

It is a super-2 number, since 2×257967373² = 133094331065042258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257967973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128983686 + 128983687.

It is an arithmetic number, because the mean of its divisors is an integer number (128983687).

Almost surely, 2^257967373 is an apocalyptic number.

It is an amenable number.

257967373 is a deficient number, since it is larger than the sum of its proper divisors (1).

257967373 is an equidigital number, since it uses as much as digits as its factorization.

257967373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1666980, while the sum is 49.

The square root of 257967373 is about 16061.3627379497. The cubic root of 257967373 is about 636.5828394273.

The spelling of 257967373 in words is "two hundred fifty-seven million, nine hundred sixty-seven thousand, three hundred seventy-three".