163607021 has 2 divisors, whose sum is σ = 163607022. Its totient is φ = 163607020.

The previous prime is 163606999. The next prime is 163607029. The reversal of 163607021 is 120706361.

163607021 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., 134328100 + 29278921 = 11590^2 + 5411^2 .

It is an emirp because it is prime and its reverse (120706361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163607021 - 2⁶ = 163606957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163607029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81803510 + 81803511.

It is an arithmetic number, because the mean of its divisors is an integer number (81803511).

Almost surely, 2^163607021 is an apocalyptic number.

It is an amenable number.

163607021 is a deficient number, since it is larger than the sum of its proper divisors (1).

163607021 is an equidigital number, since it uses as much as digits as its factorization.

163607021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 163607021 is about 12790.8960202169. The cubic root of 163607021 is about 546.9328123960.

The spelling of 163607021 in words is "one hundred sixty-three million, six hundred seven thousand, twenty-one".