163465993 has 2 divisors, whose sum is σ = 163465994. Its totient is φ = 163465992.

The previous prime is 163465979. The next prime is 163466021. The reversal of 163465993 is 399564361.

163465993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132641289 + 30824704 = 11517^2 + 5552^2 .

It is a cyclic number.

It is not a de Polignac number, because 163465993 - 2⁹ = 163465481 is a prime.

It is a super-2 number, since 2×163465993² = 53442261734952098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (163465903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81732996 + 81732997.

It is an arithmetic number, because the mean of its divisors is an integer number (81732997).

Almost surely, 2^163465993 is an apocalyptic number.

It is an amenable number.

163465993 is a deficient number, since it is larger than the sum of its proper divisors (1).

163465993 is an equidigital number, since it uses as much as digits as its factorization.

163465993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 524880, while the sum is 46.

The square root of 163465993 is about 12785.3820044612. The cubic root of 163465993 is about 546.7756165873.

The spelling of 163465993 in words is "one hundred sixty-three million, four hundred sixty-five thousand, nine hundred ninety-three".