2981893 has 4 divisors (see below), whose sum is σ = 2994508. Its totient is φ = 2969280.

The previous prime is 2981887. The next prime is 2981897. The reversal of 2981893 is 3981892.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1896129 + 1085764 = 1377^2 + 1042^2 .

It is a cyclic number.

It is not a de Polignac number, because 2981893 - 2¹³ = 2973701 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2981897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5946 + ... + 6427.

It is an arithmetic number, because the mean of its divisors is an integer number (748627).

2^2981893 is an apocalyptic number.

It is an amenable number.

2981893 is a deficient number, since it is larger than the sum of its proper divisors (12615).

2981893 is a wasteful number, since it uses less digits than its factorization.

2981893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12614.

The product of its digits is 31104, while the sum is 40.

The square root of 2981893 is about 1726.8158558457. The cubic root of 2981893 is about 143.9342066979.

Subtracting 2981893 from its reverse (3981892), we obtain a palindrome (999999).

The spelling of 2981893 in words is "two million, nine hundred eighty-one thousand, eight hundred ninety-three".