639196703 has 4 divisors (see below), whose sum is σ = 666987888. Its totient is φ = 611405520.

The previous prime is 639196699. The next prime is 639196709. The reversal of 639196703 is 307691936.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 639196703 - 2² = 639196699 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639196709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13895558 + ... + 13895603.

It is an arithmetic number, because the mean of its divisors is an integer number (166746972).

Almost surely, 2^639196703 is an apocalyptic number.

639196703 is a deficient number, since it is larger than the sum of its proper divisors (27791185).

639196703 is a wasteful number, since it uses less digits than its factorization.

639196703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27791184.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 639196703 is about 25282.3397453638. The cubic root of 639196703 is about 861.4131727826.

The spelling of 639196703 in words is "six hundred thirty-nine million, one hundred ninety-six thousand, seven hundred three".