42943237 has 2 divisors, whose sum is σ = 42943238. Its totient is φ = 42943236.

The previous prime is 42943217. The next prime is 42943259. The reversal of 42943237 is 73234924.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34175716 + 8767521 = 5846^2 + 2961^2 .

It is a cyclic number.

It is not a de Polignac number, because 42943237 - 2¹¹ = 42941189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42943217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21471618 + 21471619.

It is an arithmetic number, because the mean of its divisors is an integer number (21471619).

Almost surely, 2^42943237 is an apocalyptic number.

It is an amenable number.

42943237 is a deficient number, since it is larger than the sum of its proper divisors (1).

42943237 is an equidigital number, since it uses as much as digits as its factorization.

42943237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 34.

The square root of 42943237 is about 6553.1089568235. The cubic root of 42943237 is about 350.1855804938.

The spelling of 42943237 in words is "forty-two million, nine hundred forty-three thousand, two hundred thirty-seven".