640160333 has 2 divisors, whose sum is σ = 640160334. Its totient is φ = 640160332.

The previous prime is 640160303. The next prime is 640160359. The reversal of 640160333 is 333061046.

It is an a-pointer prime, because the next prime (640160359) can be obtained adding 640160333 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 520432969 + 119727364 = 22813^2 + 10942^2 .

It is a cyclic number.

It is not a de Polignac number, because 640160333 - 2¹⁰ = 640159309 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 (640160303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320080166 + 320080167.

It is an arithmetic number, because the mean of its divisors is an integer number (320080167).

Almost surely, 2^640160333 is an apocalyptic number.

It is an amenable number.

640160333 is a deficient number, since it is larger than the sum of its proper divisors (1).

640160333 is an equidigital number, since it uses as much as digits as its factorization.

640160333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 640160333 is about 25301.3899420565. The cubic root of 640160333 is about 861.8458339577.

The spelling of 640160333 in words is "six hundred forty million, one hundred sixty thousand, three hundred thirty-three".