639380167 has 2 divisors, whose sum is σ = 639380168. Its totient is φ = 639380166.

The previous prime is 639380143. The next prime is 639380213. The reversal of 639380167 is 761083936.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 639380167 - 2¹⁹ = 638855879 is a prime.

It is a super-3 number, since 3×639380167³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (639380767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319690083 + 319690084.

It is an arithmetic number, because the mean of its divisors is an integer number (319690084).

Almost surely, 2^639380167 is an apocalyptic number.

639380167 is a deficient number, since it is larger than the sum of its proper divisors (1).

639380167 is an equidigital number, since it uses as much as digits as its factorization.

639380167 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 639380167 is about 25285.9677884790. The cubic root of 639380167 is about 861.4955799601.

The spelling of 639380167 in words is "six hundred thirty-nine million, three hundred eighty thousand, one hundred sixty-seven".