163423081 has 2 divisors, whose sum is σ = 163423082. Its totient is φ = 163423080.

The previous prime is 163423067. The next prime is 163423093. The reversal of 163423081 is 180324361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161518681 + 1904400 = 12709^2 + 1380^2 .

It is a cyclic number.

It is not a de Polignac number, because 163423081 - 2⁵ = 163423049 is a prime.

It is a super-2 number, since 2×163423081² = 53414206807065122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (163423021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81711540 + 81711541.

It is an arithmetic number, because the mean of its divisors is an integer number (81711541).

Almost surely, 2^163423081 is an apocalyptic number.

It is an amenable number.

163423081 is a deficient number, since it is larger than the sum of its proper divisors (1).

163423081 is an equidigital number, since it uses as much as digits as its factorization.

163423081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 163423081 is about 12783.7037277934. The cubic root of 163423081 is about 546.7277671064.

The spelling of 163423081 in words is "one hundred sixty-three million, four hundred twenty-three thousand, eighty-one".