163156657 has 2 divisors, whose sum is σ = 163156658. Its totient is φ = 163156656.

The previous prime is 163156597. The next prime is 163156661. The reversal of 163156657 is 756651361.

163156657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156725361 + 6431296 = 12519^2 + 2536^2 .

It is an emirp because it is prime and its reverse (756651361) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163156657 is a prime.

It is not a weakly prime, because it can be changed into another prime (163156057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81578328 + 81578329.

It is an arithmetic number, because the mean of its divisors is an integer number (81578329).

Almost surely, 2^163156657 is an apocalyptic number.

It is an amenable number.

163156657 is a deficient number, since it is larger than the sum of its proper divisors (1).

163156657 is an equidigital number, since it uses as much as digits as its factorization.

163156657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 40.

The square root of 163156657 is about 12773.2790230230. The cubic root of 163156657 is about 546.4305005976.

The spelling of 163156657 in words is "one hundred sixty-three million, one hundred fifty-six thousand, six hundred fifty-seven".