163688123 has 2 divisors, whose sum is σ = 163688124. Its totient is φ = 163688122.

The previous prime is 163688117. The next prime is 163688137. The reversal of 163688123 is 321886361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 163688123 - 2¹⁶ = 163622587 is a prime.

It is a super-2 number, since 2×163688123² = 53587603222526258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (163688323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81844061 + 81844062.

It is an arithmetic number, because the mean of its divisors is an integer number (81844062).

Almost surely, 2^163688123 is an apocalyptic number.

163688123 is a deficient number, since it is larger than the sum of its proper divisors (1).

163688123 is an equidigital number, since it uses as much as digits as its factorization.

163688123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 38.

The square root of 163688123 is about 12794.0659291720. The cubic root of 163688123 is about 547.0231712269.

The spelling of 163688123 in words is "one hundred sixty-three million, six hundred eighty-eight thousand, one hundred twenty-three".