5133991 has 4 divisors (see below), whose sum is σ = 5357232. Its totient is φ = 4910752.

The previous prime is 5133977. The next prime is 5134013. The reversal of 5133991 is 1993315.

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 5133991 - 2¹⁵ = 5101223 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 (5133911) 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, 111586 + ... + 111631.

It is an arithmetic number, because the mean of its divisors is an integer number (1339308).

Almost surely, 2^5133991 is an apocalyptic number.

5133991 is a deficient number, since it is larger than the sum of its proper divisors (223241).

5133991 is a wasteful number, since it uses less digits than its factorization.

5133991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223240.

The product of its digits is 3645, while the sum is 31.

The square root of 5133991 is about 2265.8311940654. The cubic root of 5133991 is about 172.5116256255.

The spelling of 5133991 in words is "five million, one hundred thirty-three thousand, nine hundred ninety-one".