2643149 has 4 divisors (see below), whose sum is σ = 2656764. Its totient is φ = 2629536.

The previous prime is 2643133. The next prime is 2643161. The reversal of 2643149 is 9413462.

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 1974025 + 669124 = 1405^2 + 818^2 .

It is a cyclic number.

It is not a de Polignac number, because 2643149 - 2⁴ = 2643133 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2³ + 6³ + 4² + 3¹³ + 1 + 4¹⁰ + 9 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2643119) 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, 6512 + ... + 6905.

It is an arithmetic number, because the mean of its divisors is an integer number (664191).

2^2643149 is an apocalyptic number.

It is an amenable number.

2643149 is a deficient number, since it is larger than the sum of its proper divisors (13615).

2643149 is a wasteful number, since it uses less digits than its factorization.

2643149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13614.

The product of its digits is 5184, while the sum is 29.

The square root of 2643149 is about 1625.7764298943. The cubic root of 2643149 is about 138.2633945909.

The spelling of 2643149 in words is "two million, six hundred forty-three thousand, one hundred forty-nine".