163640333 has 2 divisors, whose sum is σ = 163640334. Its totient is φ = 163640332.

The previous prime is 163640273. The next prime is 163640341. The reversal of 163640333 is 333046361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160098409 + 3541924 = 12653^2 + 1882^2 .

It is a cyclic number.

It is not a de Polignac number, because 163640333 - 2⁸ = 163640077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163640296 and 163640305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163640383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81820166 + 81820167.

It is an arithmetic number, because the mean of its divisors is an integer number (81820167).

Almost surely, 2^163640333 is an apocalyptic number.

It is an amenable number.

163640333 is a deficient number, since it is larger than the sum of its proper divisors (1).

163640333 is an equidigital number, since it uses as much as digits as its factorization.

163640333 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 29.

The square root of 163640333 is about 12792.1981301104. The cubic root of 163640333 is about 546.9699301784.

Adding to 163640333 its reverse (333046361), we get a palindrome (496686694).

The spelling of 163640333 in words is "one hundred sixty-three million, six hundred forty thousand, three hundred thirty-three".