163340081 has 2 divisors, whose sum is σ = 163340082. Its totient is φ = 163340080.

The previous prime is 163340077. The next prime is 163340083. The reversal of 163340081 is 180043361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91853056 + 71487025 = 9584^2 + 8455^2 .

It is a cyclic number.

It is not a de Polignac number, because 163340081 - 2² = 163340077 is a prime.

It is a super-2 number, since 2×163340081² = 53359964122173122, which contains 22 as substring.

Together with 163340083, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163340081.

It is not a weakly prime, because it can be changed into another prime (163340083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81670040 + 81670041.

It is an arithmetic number, because the mean of its divisors is an integer number (81670041).

Almost surely, 2^163340081 is an apocalyptic number.

It is an amenable number.

163340081 is a deficient number, since it is larger than the sum of its proper divisors (1).

163340081 is an equidigital number, since it uses as much as digits as its factorization.

163340081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 163340081 is about 12780.4569949591. The cubic root of 163340081 is about 546.6351933017.

It can be divided in two parts, 1633 and 40081, that added together give a palindrome (41714).

The spelling of 163340081 in words is "one hundred sixty-three million, three hundred forty thousand, eighty-one".