639417102 has 16 divisors (see below), whose sum is σ = 1300510080. Its totient is φ = 209526392.

The previous prime is 639417101. The next prime is 639417131. The reversal of 639417102 is 201714936.

639417102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639417101) 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, 902778 + ... + 903485.

It is an arithmetic number, because the mean of its divisors is an integer number (81281880).

Almost surely, 2^639417102 is an apocalyptic number.

639417102 is an abundant number, since it is smaller than the sum of its proper divisors (661092978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

639417102 is a wasteful number, since it uses less digits than its factorization.

639417102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1806327.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 639417102 is about 25286.6981237171. The cubic root of 639417102 is about 861.5121682791.

The spelling of 639417102 in words is "six hundred thirty-nine million, four hundred seventeen thousand, one hundred two".