640314167 has 2 divisors, whose sum is σ = 640314168. Its totient is φ = 640314166.

The previous prime is 640314151. The next prime is 640314173. The reversal of 640314167 is 761413046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 640314167 - 2⁴ = 640314151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (640314127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320157083 + 320157084.

It is an arithmetic number, because the mean of its divisors is an integer number (320157084).

Almost surely, 2^640314167 is an apocalyptic number.

640314167 is a deficient number, since it is larger than the sum of its proper divisors (1).

640314167 is an equidigital number, since it uses as much as digits as its factorization.

640314167 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 640314167 is about 25304.4297900585. The cubic root of 640314167 is about 861.9148638380.

The spelling of 640314167 in words is "six hundred forty million, three hundred fourteen thousand, one hundred sixty-seven".