163388257 has 2 divisors, whose sum is σ = 163388258. Its totient is φ = 163388256.

The previous prime is 163388249. The next prime is 163388299. The reversal of 163388257 is 752883361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155525841 + 7862416 = 12471^2 + 2804^2 .

It is a cyclic number.

It is not a de Polignac number, because 163388257 - 2³ = 163388249 is a prime.

It is not a weakly prime, because it can be changed into another prime (163380257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81694128 + 81694129.

It is an arithmetic number, because the mean of its divisors is an integer number (81694129).

Almost surely, 2^163388257 is an apocalyptic number.

It is an amenable number.

163388257 is a deficient number, since it is larger than the sum of its proper divisors (1).

163388257 is an equidigital number, since it uses as much as digits as its factorization.

163388257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 43.

The square root of 163388257 is about 12782.3416086412. The cubic root of 163388257 is about 546.6889300785.

The spelling of 163388257 in words is "one hundred sixty-three million, three hundred eighty-eight thousand, two hundred fifty-seven".