163047257 has 2 divisors, whose sum is σ = 163047258. Its totient is φ = 163047256.

The previous prime is 163047223. The next prime is 163047263. The reversal of 163047257 is 752740361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161315401 + 1731856 = 12701^2 + 1316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163047257 is a prime.

It is not a weakly prime, because it can be changed into another prime (163047757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81523628 + 81523629.

It is an arithmetic number, because the mean of its divisors is an integer number (81523629).

Almost surely, 2^163047257 is an apocalyptic number.

It is an amenable number.

163047257 is a deficient number, since it is larger than the sum of its proper divisors (1).

163047257 is an equidigital number, since it uses as much as digits as its factorization.

163047257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 163047257 is about 12768.9959276366. The cubic root of 163047257 is about 546.3083422090.

The spelling of 163047257 in words is "one hundred sixty-three million, forty-seven thousand, two hundred fifty-seven".