2440643 has 2 divisors, whose sum is σ = 2440644. Its totient is φ = 2440642.

The previous prime is 2440621. The next prime is 2440649. The reversal of 2440643 is 3460442.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2440643 - 2⁶ = 2440579 is a prime.

It is a super-3 number, since 3×2440643³ = 43614814563337583121, which contains 333 as substring.

It is a zygodrome in base 5.

It is not a weakly prime, because it can be changed into another prime (2440649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1220321 + 1220322.

It is an arithmetic number, because the mean of its divisors is an integer number (1220322).

2^2440643 is an apocalyptic number.

2440643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2440643 is an equidigital number, since it uses as much as digits as its factorization.

2440643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 2440643 is about 1562.2557409080. The cubic root of 2440643 is about 134.6381346877.

The spelling of 2440643 in words is "two million, four hundred forty thousand, six hundred forty-three".