42838643 has 2 divisors, whose sum is σ = 42838644. Its totient is φ = 42838642.

The previous prime is 42838633. The next prime is 42838669. The reversal of 42838643 is 34683824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42838643 - 2⁸ = 42838387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42838597 and 42838606.

It is not a weakly prime, because it can be changed into another prime (42838603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21419321 + 21419322.

It is an arithmetic number, because the mean of its divisors is an integer number (21419322).

Almost surely, 2^42838643 is an apocalyptic number.

42838643 is a deficient number, since it is larger than the sum of its proper divisors (1).

42838643 is an equidigital number, since it uses as much as digits as its factorization.

42838643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 38.

The square root of 42838643 is about 6545.1236046388. The cubic root of 42838643 is about 349.9010414110.

The spelling of 42838643 in words is "forty-two million, eight hundred thirty-eight thousand, six hundred forty-three".