4813991 has 8 divisors (see below), whose sum is σ = 5925024. Its totient is φ = 3808800.

The previous prime is 4813961. The next prime is 4813997. The reversal of 4813991 is 1993184.

4813991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4813991 - 2¹⁴ = 4797607 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4813997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26360 + ... + 26541.

It is an arithmetic number, because the mean of its divisors is an integer number (740628).

Almost surely, 2^4813991 is an apocalyptic number.

4813991 is a deficient number, since it is larger than the sum of its proper divisors (1111033).

4813991 is a wasteful number, since it uses less digits than its factorization.

4813991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52921.

The product of its digits is 7776, while the sum is 35.

The square root of 4813991 is about 2194.0809009697. The cubic root of 4813991 is about 168.8502694444.

It can be divided in two parts, 48139 and 91, that multiplied together give a square (4380649 = 2093²).

The spelling of 4813991 in words is "four million, eight hundred thirteen thousand, nine hundred ninety-one".