2643437 has 4 divisors (see below), whose sum is σ = 2734620. Its totient is φ = 2552256.

The previous prime is 2643427. The next prime is 2643439. The reversal of 2643437 is 7343462.

It is a happy number.

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 609961 + 2033476 = 781^2 + 1426^2 .

It is a cyclic number.

It is not a de Polignac number, because 2643437 - 2⁸ = 2643181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 91153 = 2643437 / (2 + 6 + 4 + 3 + 4 + 3 + 7).

It is a d-powerful number, because it can be written as 2⁹ + 6 + 4 + 3² + 4¹⁰ + 3¹³ + 7 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2643439) 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, 45548 + ... + 45605.

It is an arithmetic number, because the mean of its divisors is an integer number (683655).

2^2643437 is an apocalyptic number.

It is an amenable number.

2643437 is a deficient number, since it is larger than the sum of its proper divisors (91183).

2643437 is an equidigital number, since it uses as much as digits as its factorization.

2643437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91182.

The product of its digits is 12096, while the sum is 29.

The square root of 2643437 is about 1625.8650005459. The cubic root of 2643437 is about 138.2684161784.

Adding to 2643437 its reverse (7343462), we get a palindrome (9986899).

The spelling of 2643437 in words is "two million, six hundred forty-three thousand, four hundred thirty-seven".