640035167 has 2 divisors, whose sum is σ = 640035168. Its totient is φ = 640035166.

The previous prime is 640035163. The next prime is 640035203. The reversal of 640035167 is 761530046.

640035167 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 is a cyclic number.

It is not a de Polignac number, because 640035167 - 2² = 640035163 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (640035163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320017583 + 320017584.

It is an arithmetic number, because the mean of its divisors is an integer number (320017584).

Almost surely, 2^640035167 is an apocalyptic number.

640035167 is a deficient number, since it is larger than the sum of its proper divisors (1).

640035167 is an equidigital number, since it uses as much as digits as its factorization.

640035167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 640035167 is about 25298.9163206648. The cubic root of 640035167 is about 861.7896600996.

The spelling of 640035167 in words is "six hundred forty million, thirty-five thousand, one hundred sixty-seven".