993420161 has 2 divisors, whose sum is σ = 993420162. Its totient is φ = 993420160.

The previous prime is 993420137. The next prime is 993420173. The reversal of 993420161 is 161024399.

993420161 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., 989479936 + 3940225 = 31456^2 + 1985^2 .

It is a cyclic number.

It is not a de Polignac number, because 993420161 - 2⁶ = 993420097 is a prime.

It is not a weakly prime, because it can be changed into another prime (993420121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496710080 + 496710081.

It is an arithmetic number, because the mean of its divisors is an integer number (496710081).

Almost surely, 2^993420161 is an apocalyptic number.

It is an amenable number.

993420161 is a deficient number, since it is larger than the sum of its proper divisors (1).

993420161 is an equidigital number, since it uses as much as digits as its factorization.

993420161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 993420161 is about 31518.5685112760. The cubic root of 993420161 is about 997.8018921956.

The spelling of 993420161 in words is "nine hundred ninety-three million, four hundred twenty thousand, one hundred sixty-one".