639106046 has 4 divisors (see below), whose sum is σ = 958659072. Its totient is φ = 319553022.

The previous prime is 639106019. The next prime is 639106057. The reversal of 639106046 is 640601936.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 639105997 and 639106015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159776510 + ... + 159776513.

It is an arithmetic number, because the mean of its divisors is an integer number (239664768).

Almost surely, 2^639106046 is an apocalyptic number.

639106046 is a deficient number, since it is larger than the sum of its proper divisors (319553026).

639106046 is a wasteful number, since it uses less digits than its factorization.

639106046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319553025.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 639106046 is about 25280.5467899727. The cubic root of 639106046 is about 861.3724462342.

The spelling of 639106046 in words is "six hundred thirty-nine million, one hundred six thousand, forty-six".