163955641 has 2 divisors, whose sum is σ = 163955642. Its totient is φ = 163955640.

The previous prime is 163955593. The next prime is 163955677. The reversal of 163955641 is 146559361.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163942416 + 13225 = 12804^2 + 115^2 .

It is a cyclic number.

It is not a de Polignac number, because 163955641 - 2¹⁵ = 163922873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163955594 and 163955603.

It is not a weakly prime, because it can be changed into another prime (163955681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81977820 + 81977821.

It is an arithmetic number, because the mean of its divisors is an integer number (81977821).

Almost surely, 2^163955641 is an apocalyptic number.

It is an amenable number.

163955641 is a deficient number, since it is larger than the sum of its proper divisors (1).

163955641 is an equidigital number, since it uses as much as digits as its factorization.

163955641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 40.

The square root of 163955641 is about 12804.5164297602. The cubic root of 163955641 is about 547.3210118058.

The spelling of 163955641 in words is "one hundred sixty-three million, nine hundred fifty-five thousand, six hundred forty-one".