2621893 has 4 divisors (see below), whose sum is σ = 2776140. Its totient is φ = 2467648.

The previous prime is 2621881. The next prime is 2621897. The reversal of 2621893 is 3981262.

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 1954404 + 667489 = 1398^2 + 817^2 .

It is a cyclic number.

It is not a de Polignac number, because 2621893 - 2¹³ = 2613701 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 2⁷ + 6³ + 2¹⁹ + 1 + 8⁷ + 9² + 3³ .

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2621897) 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, 77098 + ... + 77131.

It is an arithmetic number, because the mean of its divisors is an integer number (694035).

2^2621893 is an apocalyptic number.

It is an amenable number.

2621893 is a deficient number, since it is larger than the sum of its proper divisors (154247).

2621893 is a wasteful number, since it uses less digits than its factorization.

2621893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154246.

The product of its digits is 5184, while the sum is 31.

The square root of 2621893 is about 1619.2260496916. The cubic root of 2621893 is about 137.8917620786.

The spelling of 2621893 in words is "two million, six hundred twenty-one thousand, eight hundred ninety-three".