639249603 has 16 divisors (see below), whose sum is σ = 892262400. Its totient is φ = 406321344.

The previous prime is 639249577. The next prime is 639249617. The reversal of 639249603 is 306942936.

It is not a de Polignac number, because 639249603 - 2¹² = 639245507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (639249673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6798 + ... + 36396.

It is an arithmetic number, because the mean of its divisors is an integer number (55766400).

Almost surely, 2^639249603 is an apocalyptic number.

639249603 is a deficient number, since it is larger than the sum of its proper divisors (253012797).

639249603 is a wasteful number, since it uses less digits than its factorization.

639249603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29938.

The product of its (nonzero) digits is 209952, while the sum is 42.

The square root of 639249603 is about 25283.3859085369. The cubic root of 639249603 is about 861.4369356814.

The spelling of 639249603 in words is "six hundred thirty-nine million, two hundred forty-nine thousand, six hundred three".