639300049 has 8 divisors (see below), whose sum is σ = 688598240. Its totient is φ = 591566976.

The previous prime is 639299989. The next prime is 639300061. The reversal of 639300049 is 940003936.

639300049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 639300049 - 2¹¹ = 639298001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 639299987 and 639300023.

It is not an unprimeable number, because it can be changed into a prime (639300089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390432 + ... + 392065.

It is an arithmetic number, because the mean of its divisors is an integer number (86074780).

Almost surely, 2^639300049 is an apocalyptic number.

It is an amenable number.

639300049 is a deficient number, since it is larger than the sum of its proper divisors (49298191).

639300049 is a wasteful number, since it uses less digits than its factorization.

639300049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782559.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 639300049 is about 25284.3835004929. The cubic root of 639300049 is about 861.4595950122.

The spelling of 639300049 in words is "six hundred thirty-nine million, three hundred thousand, forty-nine".