2981813 has 4 divisors (see below), whose sum is σ = 2993088. Its totient is φ = 2970540.

The previous prime is 2981779. The next prime is 2981819. The reversal of 2981813 is 3181892.

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.

It is a cyclic number.

It is not a de Polignac number, because 2981813 - 2¹² = 2977717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2981813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2981819) 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, 5231 + ... + 5772.

It is an arithmetic number, because the mean of its divisors is an integer number (748272).

2^2981813 is an apocalyptic number.

It is an amenable number.

2981813 is a deficient number, since it is larger than the sum of its proper divisors (11275).

2981813 is a wasteful number, since it uses less digits than its factorization.

2981813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11274.

The product of its digits is 3456, while the sum is 32.

The square root of 2981813 is about 1726.7926916686. The cubic root of 2981813 is about 143.9329195022.

The spelling of 2981813 in words is "two million, nine hundred eighty-one thousand, eight hundred thirteen".