5139423971 has 4 divisors (see below), whose sum is σ = 5606644344. Its totient is φ = 4672203600.

The previous prime is 5139423967. The next prime is 5139423973. The reversal of 5139423971 is 1793249315.

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 5139423971 - 2² = 5139423967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5139423973) 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, 233610170 + ... + 233610191.

It is an arithmetic number, because the mean of its divisors is an integer number (1401661086).

Almost surely, 2^5139423971 is an apocalyptic number.

5139423971 is a deficient number, since it is larger than the sum of its proper divisors (467220373).

5139423971 is a wasteful number, since it uses less digits than its factorization.

5139423971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467220372.

The product of its digits is 204120, while the sum is 44.

The square root of 5139423971 is about 71689.7759167930. The cubic root of 5139423971 is about 1725.7245680880.

The spelling of 5139423971 in words is "five billion, one hundred thirty-nine million, four hundred twenty-three thousand, nine hundred seventy-one".