5139997 has 4 divisors (see below), whose sum is σ = 5146236. Its totient is φ = 5133760.

The previous prime is 5139983. The next prime is 5140007. The reversal of 5139997 is 7999315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7999315 = 5 ⋅1599863.

It can be written as a sum of positive squares in 2 ways, for example, as 4384836 + 755161 = 2094^2 + 869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5139997 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 (5139907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1654 + ... + 3607.

It is an arithmetic number, because the mean of its divisors is an integer number (1286559).

Almost surely, 2^5139997 is an apocalyptic number.

It is an amenable number.

5139997 is a deficient number, since it is larger than the sum of its proper divisors (6239).

5139997 is an equidigital number, since it uses as much as digits as its factorization.

5139997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6238.

The product of its digits is 76545, while the sum is 43.

The square root of 5139997 is about 2267.1561481292. The cubic root of 5139997 is about 172.5788703257.

The spelling of 5139997 in words is "five million, one hundred thirty-nine thousand, nine hundred ninety-seven".