5139989 has 6 divisors (see below), whose sum is σ = 5329890. Its totient is φ = 4950960.

The previous prime is 5139983. The next prime is 5140007. The reversal of 5139989 is 9899315.

It can be written as a sum of positive squares in 3 ways, for example, as 483025 + 4656964 = 695^2 + 2158^2 .

It is not a de Polignac number, because 5139989 - 2⁴ = 5139973 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 (5139983) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11999 + ... + 12419.

It is an arithmetic number, because the mean of its divisors is an integer number (888315).

Almost surely, 2^5139989 is an apocalyptic number.

It is an amenable number.

5139989 is a deficient number, since it is larger than the sum of its proper divisors (189901).

5139989 is an frugal number, since it uses more digits than its factorization.

5139989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871 (or 450 counting only the distinct ones).

The product of its digits is 87480, while the sum is 44.

The square root of 5139989 is about 2267.1543838036. The cubic root of 5139989 is about 172.5787807905.

The spelling of 5139989 in words is "five million, one hundred thirty-nine thousand, nine hundred eighty-nine".