639702673003 has 4 divisors (see below), whose sum is σ = 673371234760. Its totient is φ = 606034111248.

The previous prime is 639702672991. The next prime is 639702673063. The reversal of 639702673003 is 300376207936.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 639702673003 - 2⁵ = 639702672971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (639702673063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16834280850 + ... + 16834280887.

It is an arithmetic number, because the mean of its divisors is an integer number (168342808690).

Almost surely, 2^639702673003 is an apocalyptic number.

639702673003 is a deficient number, since it is larger than the sum of its proper divisors (33668561757).

639702673003 is a wasteful number, since it uses less digits than its factorization.

639702673003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33668561756.

The product of its (nonzero) digits is 857304, while the sum is 46.

The spelling of 639702673003 in words is "six hundred thirty-nine billion, seven hundred two million, six hundred seventy-three thousand, three".