5139947 has 4 divisors (see below), whose sum is σ = 5144520. Its totient is φ = 5135376.

The previous prime is 5139923. The next prime is 5139949. The reversal of 5139947 is 7499315.

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 is a cyclic number.

It is not a de Polignac number, because 5139947 - 2⁸ = 5139691 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5139947.

It is not an unprimeable number, because it can be changed into a prime (5139949) 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, 704 + ... + 3282.

It is an arithmetic number, because the mean of its divisors is an integer number (1286130).

Almost surely, 2^5139947 is an apocalyptic number.

5139947 is a deficient number, since it is larger than the sum of its proper divisors (4573).

5139947 is a wasteful number, since it uses less digits than its factorization.

5139947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4572.

The product of its digits is 34020, while the sum is 38.

The square root of 5139947 is about 2267.1451210719. The cubic root of 5139947 is about 172.5783107293.

The spelling of 5139947 in words is "five million, one hundred thirty-nine thousand, nine hundred forty-seven".