639382883 has 2 divisors, whose sum is σ = 639382884. Its totient is φ = 639382882.

The previous prime is 639382879. The next prime is 639382921. The reversal of 639382883 is 388283936.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 639382883 - 2² = 639382879 is a prime.

It is not a weakly prime, because it can be changed into another prime (639382873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319691441 + 319691442.

It is an arithmetic number, because the mean of its divisors is an integer number (319691442).

Almost surely, 2^639382883 is an apocalyptic number.

639382883 is a deficient number, since it is larger than the sum of its proper divisors (1).

639382883 is an equidigital number, since it uses as much as digits as its factorization.

639382883 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 50.

The square root of 639382883 is about 25286.0214940983. The cubic root of 639382883 is about 861.4967997971.

The spelling of 639382883 in words is "six hundred thirty-nine million, three hundred eighty-two thousand, eight hundred eighty-three".