4936639823 has 4 divisors (see below), whose sum is σ = 4937738208. Its totient is φ = 4935541440.

The previous prime is 4936639801. The next prime is 4936639853. The reversal of 4936639823 is 3289366394.

4936639823 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4936639823 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 (4936639853) 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, 542423 + ... + 551448.

It is an arithmetic number, because the mean of its divisors is an integer number (1234434552).

Almost surely, 2^4936639823 is an apocalyptic number.

4936639823 is a deficient number, since it is larger than the sum of its proper divisors (1098385).

4936639823 is a wasteful number, since it uses less digits than its factorization.

4936639823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098384.

The product of its digits is 5038848, while the sum is 53.

The square root of 4936639823 is about 70261.2256013230. The cubic root of 4936639823 is about 1702.7222616163.

The spelling of 4936639823 in words is "four billion, nine hundred thirty-six million, six hundred thirty-nine thousand, eight hundred twenty-three".