5136991 has 4 divisors (see below), whose sum is σ = 5194800. Its totient is φ = 5079184.

The previous prime is 5136977. The next prime is 5137001. The reversal of 5136991 is 1996315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1996315 = 5 ⋅399263.

It is a cyclic number.

It is not a de Polignac number, because 5136991 - 2⁷ = 5136863 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 (5136491) 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, 28771 + ... + 28948.

It is an arithmetic number, because the mean of its divisors is an integer number (1298700).

Almost surely, 2^5136991 is an apocalyptic number.

5136991 is a deficient number, since it is larger than the sum of its proper divisors (57809).

5136991 is an equidigital number, since it uses as much as digits as its factorization.

5136991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57808.

The product of its digits is 7290, while the sum is 34.

The square root of 5136991 is about 2266.4931061003. The cubic root of 5136991 is about 172.5452209385.

The spelling of 5136991 in words is "five million, one hundred thirty-six thousand, nine hundred ninety-one".