5136639 has 4 divisors (see below), whose sum is σ = 6848856. Its totient is φ = 3424424.

The previous prime is 5136629. The next prime is 5136661. The reversal of 5136639 is 9366315.

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 5136639 - 2⁴ = 5136623 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5136629) 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, 856104 + ... + 856109.

It is an arithmetic number, because the mean of its divisors is an integer number (1712214).

Almost surely, 2^5136639 is an apocalyptic number.

5136639 is a deficient number, since it is larger than the sum of its proper divisors (1712217).

5136639 is a wasteful number, since it uses less digits than its factorization.

5136639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712216.

The product of its digits is 14580, while the sum is 33.

The square root of 5136639 is about 2266.4154517652. The cubic root of 5136639 is about 172.5412797659.

It can be divided in two parts, 5136 and 639, that added together give a palindrome (5775).

The spelling of 5136639 in words is "five million, one hundred thirty-six thousand, six hundred thirty-nine".