5139866789 has 4 divisors (see below), whose sum is σ = 5140012620. Its totient is φ = 5139720960.

The previous prime is 5139866779. The next prime is 5139866813. The reversal of 5139866789 is 9876689315.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2046838564 + 3093028225 = 45242^2 + 55615^2 .

It is a cyclic number.

It is not a de Polignac number, because 5139866789 - 2⁴ = 5139866773 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 (5139866779) 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, 16517 + ... + 102725.

It is an arithmetic number, because the mean of its divisors is an integer number (1285003155).

Almost surely, 2^5139866789 is an apocalyptic number.

It is an amenable number.

5139866789 is a deficient number, since it is larger than the sum of its proper divisors (145831).

5139866789 is an equidigital number, since it uses as much as digits as its factorization.

5139866789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145830.

The product of its digits is 19595520, while the sum is 62.

The square root of 5139866789 is about 71692.8642822980. The cubic root of 5139866789 is about 1725.7741300596.

The spelling of 5139866789 in words is "five billion, one hundred thirty-nine million, eight hundred sixty-six thousand, seven hundred eighty-nine".