5278639903 has 4 divisors (see below), whose sum is σ = 5278827888. Its totient is φ = 5278451920.

The previous prime is 5278639897. The next prime is 5278639921. The reversal of 5278639903 is 3099368725.

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 5278639903 - 2⁹ = 5278639391 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 (5278639973) 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, 42451 + ... + 111172.

It is an arithmetic number, because the mean of its divisors is an integer number (1319706972).

Almost surely, 2^5278639903 is an apocalyptic number.

5278639903 is a deficient number, since it is larger than the sum of its proper divisors (187985).

5278639903 is a wasteful number, since it uses less digits than its factorization.

5278639903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187984.

The product of its (nonzero) digits is 2449440, while the sum is 52.

The square root of 5278639903 is about 72654.2490361025. The cubic root of 5278639903 is about 1741.1680076699.

The spelling of 5278639903 in words is "five billion, two hundred seventy-eight million, six hundred thirty-nine thousand, nine hundred three".