639959041 has 8 divisors (see below), whose sum is σ = 644475744. Its totient is φ = 635458560.

The previous prime is 639959029. The next prime is 639959053. The reversal of 639959041 is 140959936.

It is an interprime number because it is at equal distance from previous prime (639959029) and next prime (639959053).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 639959041 - 2¹³ = 639950849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 639958982 and 639959000.

It is not an unprimeable number, because it can be changed into a prime (639959011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81306 + ... + 88828.

It is an arithmetic number, because the mean of its divisors is an integer number (80559468).

It is a Proth number, since it is equal to 9765 ⋅ 2¹⁶ + 1 and 9765 < 2¹⁶.

Almost surely, 2^639959041 is an apocalyptic number.

It is an amenable number.

639959041 is a deficient number, since it is larger than the sum of its proper divisors (4516703).

639959041 is a wasteful number, since it uses less digits than its factorization.

639959041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8111.

The product of its (nonzero) digits is 262440, while the sum is 46.

The square root of 639959041 is about 25297.4117450778. The cubic root of 639959041 is about 861.7554915600.

The spelling of 639959041 in words is "six hundred thirty-nine million, nine hundred fifty-nine thousand, forty-one".