257061373 has 2 divisors, whose sum is σ = 257061374. Its totient is φ = 257061372.

The previous prime is 257061341. The next prime is 257061391. The reversal of 257061373 is 373160752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254817369 + 2244004 = 15963^2 + 1498^2 .

It is a cyclic number.

It is not a de Polignac number, because 257061373 - 2⁵ = 257061341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257061173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128530686 + 128530687.

It is an arithmetic number, because the mean of its divisors is an integer number (128530687).

Almost surely, 2^257061373 is an apocalyptic number.

It is an amenable number.

257061373 is a deficient number, since it is larger than the sum of its proper divisors (1).

257061373 is an equidigital number, since it uses as much as digits as its factorization.

257061373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26460, while the sum is 34.

The square root of 257061373 is about 16033.1335988945. The cubic root of 257061373 is about 635.8367236748.

The spelling of 257061373 in words is "two hundred fifty-seven million, sixty-one thousand, three hundred seventy-three".