5146991 has 4 divisors (see below), whose sum is σ = 5152032. Its totient is φ = 5141952.

The previous prime is 5146957. The next prime is 5147041. The reversal of 5146991 is 1996415.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1996415 = 5 ⋅399283.

It is a cyclic number.

It is not a de Polignac number, because 5146991 - 2⁶ = 5146927 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 (5146901) 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, 386 + ... + 3231.

It is an arithmetic number, because the mean of its divisors is an integer number (1288008).

Almost surely, 2^5146991 is an apocalyptic number.

5146991 is a deficient number, since it is larger than the sum of its proper divisors (5041).

5146991 is a wasteful number, since it uses less digits than its factorization.

5146991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5040.

The product of its digits is 9720, while the sum is 35.

The square root of 5146991 is about 2268.6980848055. The cubic root of 5146991 is about 172.6571109401.

The spelling of 5146991 in words is "five million, one hundred forty-six thousand, nine hundred ninety-one".