2406643 has 2 divisors, whose sum is σ = 2406644. Its totient is φ = 2406642.

The previous prime is 2406631. The next prime is 2406647. The reversal of 2406643 is 3466042.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2406643 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 4³ + 0 + 6⁵ + 6⁷ + 4⁴ + 3¹³ .

It is equal to p₁₇₆₇₄₀ and since 2406643 and 176740 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 (2406647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1203321 + 1203322.

It is an arithmetic number, because the mean of its divisors is an integer number (1203322).

2^2406643 is an apocalyptic number.

2406643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2406643 is an equidigital number, since it uses as much as digits as its factorization.

2406643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 2406643 is about 1551.3358759469. The cubic root of 2406643 is about 134.0100051934.

The spelling of 2406643 in words is "two million, four hundred six thousand, six hundred forty-three".