42843847 has 2 divisors, whose sum is σ = 42843848. Its totient is φ = 42843846.

The previous prime is 42843809. The next prime is 42843901. The reversal of 42843847 is 74834824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42843847 - 2¹⁵ = 42811079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42843547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21421923 + 21421924.

It is an arithmetic number, because the mean of its divisors is an integer number (21421924).

Almost surely, 2^42843847 is an apocalyptic number.

42843847 is a deficient number, since it is larger than the sum of its proper divisors (1).

42843847 is an equidigital number, since it uses as much as digits as its factorization.

42843847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172032, while the sum is 40.

The square root of 42843847 is about 6545.5211404441. The cubic root of 42843847 is about 349.9152093924.

The spelling of 42843847 in words is "forty-two million, eight hundred forty-three thousand, eight hundred forty-seven".