2443643 has 2 divisors, whose sum is σ = 2443644. Its totient is φ = 2443642.

The previous prime is 2443619. The next prime is 2443657. The reversal of 2443643 is 3463442.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2443643 - 2⁸ = 2443387 is a prime.

It is a super-2 number, since 2×2443643² = 11942782222898, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p₁₇₉₂₃₄ and since 2443643 and 179234 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (2443613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1221821 + 1221822.

It is an arithmetic number, because the mean of its divisors is an integer number (1221822).

2^2443643 is an apocalyptic number.

2443643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2443643 is an equidigital number, since it uses as much as digits as its factorization.

2443643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 26.

The square root of 2443643 is about 1563.2155961351. The cubic root of 2443643 is about 134.6932771265.

The spelling of 2443643 in words is "two million, four hundred forty-three thousand, six hundred forty-three".