639703094 has 32 divisors (see below), whose sum is σ = 1018789056. Its totient is φ = 300643200.

The previous prime is 639703093. The next prime is 639703111. The reversal of 639703094 is 490307936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639703093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 728984 + ... + 729860.

It is an arithmetic number, because the mean of its divisors is an integer number (31837158).

Almost surely, 2^639703094 is an apocalyptic number.

639703094 is a deficient number, since it is larger than the sum of its proper divisors (379085962).

639703094 is a wasteful number, since it uses less digits than its factorization.

639703094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160.

The product of its (nonzero) digits is 122472, while the sum is 41.

The square root of 639703094 is about 25292.3524805424. The cubic root of 639703094 is about 861.6405919443.

The spelling of 639703094 in words is "six hundred thirty-nine million, seven hundred three thousand, ninety-four".