4813981 has 4 divisors (see below), whose sum is σ = 4819264. Its totient is φ = 4808700.

The previous prime is 4813961. The next prime is 4813997. The reversal of 4813981 is 1893184.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4813981 - 2⁹ = 4813469 is a prime.

It is a super-2 number, since 2×4813981² = 46348826136722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4813951) 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, 885 + ... + 3226.

It is an arithmetic number, because the mean of its divisors is an integer number (1204816).

Almost surely, 2^4813981 is an apocalyptic number.

It is an amenable number.

4813981 is a deficient number, since it is larger than the sum of its proper divisors (5283).

4813981 is a wasteful number, since it uses less digits than its factorization.

4813981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5282.

The product of its digits is 6912, while the sum is 34.

The square root of 4813981 is about 2194.0786221100. The cubic root of 4813981 is about 168.8501525280.

The spelling of 4813981 in words is "four million, eight hundred thirteen thousand, nine hundred eighty-one".