639560167 has 4 divisors (see below), whose sum is σ = 639611640. Its totient is φ = 639508696.

The previous prime is 639560153. The next prime is 639560183. The reversal of 639560167 is 761065936.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 639560167 - 2¹⁹ = 639035879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639560137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5709 + ... + 36217.

It is an arithmetic number, because the mean of its divisors is an integer number (159902910).

Almost surely, 2^639560167 is an apocalyptic number.

639560167 is a deficient number, since it is larger than the sum of its proper divisors (51473).

639560167 is a wasteful number, since it uses less digits than its factorization.

639560167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51472.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 639560167 is about 25289.5268243595. The cubic root of 639560167 is about 861.5764158815.

The spelling of 639560167 in words is "six hundred thirty-nine million, five hundred sixty thousand, one hundred sixty-seven".