163710257 has 2 divisors, whose sum is σ = 163710258. Its totient is φ = 163710256.

The previous prime is 163710121. The next prime is 163710263. The reversal of 163710257 is 752017361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149842081 + 13868176 = 12241^2 + 3724^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163710257 is a prime.

It is not a weakly prime, because it can be changed into another prime (163710277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81855128 + 81855129.

It is an arithmetic number, because the mean of its divisors is an integer number (81855129).

Almost surely, 2^163710257 is an apocalyptic number.

It is an amenable number.

163710257 is a deficient number, since it is larger than the sum of its proper divisors (1).

163710257 is an equidigital number, since it uses as much as digits as its factorization.

163710257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 163710257 is about 12794.9309103254. The cubic root of 163710257 is about 547.0478263759.

The spelling of 163710257 in words is "one hundred sixty-three million, seven hundred ten thousand, two hundred fifty-seven".