257532917 has 2 divisors, whose sum is σ = 257532918. Its totient is φ = 257532916.

The previous prime is 257532907. The next prime is 257532929. The reversal of 257532917 is 719235752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129367876 + 128165041 = 11374^2 + 11321^2 .

It is a cyclic number.

It is not a de Polignac number, because 257532917 - 2⁴ = 257532901 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257532907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128766458 + 128766459.

It is an arithmetic number, because the mean of its divisors is an integer number (128766459).

Almost surely, 2^257532917 is an apocalyptic number.

It is an amenable number.

257532917 is a deficient number, since it is larger than the sum of its proper divisors (1).

257532917 is an equidigital number, since it uses as much as digits as its factorization.

257532917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132300, while the sum is 41.

The square root of 257532917 is about 16047.8321588930. The cubic root of 257532917 is about 636.2252714183.

The spelling of 257532917 in words is "two hundred fifty-seven million, five hundred thirty-two thousand, nine hundred seventeen".