5042639639 has 4 divisors (see below), whose sum is σ = 5042922024. Its totient is φ = 5042357256.

The previous prime is 5042639629. The next prime is 5042639659. The reversal of 5042639639 is 9369362405.

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 5042639639 - 2⁸ = 5042639383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5042639593 and 5042639602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5042639629) 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, 112457 + ... + 150770.

It is an arithmetic number, because the mean of its divisors is an integer number (1260730506).

Almost surely, 2^5042639639 is an apocalyptic number.

5042639639 is a deficient number, since it is larger than the sum of its proper divisors (282385).

5042639639 is a wasteful number, since it uses less digits than its factorization.

5042639639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282384.

The product of its (nonzero) digits is 1049760, while the sum is 47.

The square root of 5042639639 is about 71011.5458147476. The cubic root of 5042639639 is about 1714.8230445817.

The spelling of 5042639639 in words is "five billion, forty-two million, six hundred thirty-nine thousand, six hundred thirty-nine".