84437842 has 4 divisors (see below), whose sum is σ = 126656766. Its totient is φ = 42218920.

The previous prime is 84437839. The next prime is 84437849. The reversal of 84437842 is 24873448.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 84437721 + 121 = 9189^2 + 11^2 .

It is a junction number, because it is equal to n+sod(n) for n = 84437795 and 84437804.

It is not an unprimeable number, because it can be changed into a prime (84437849) 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, 21109459 + ... + 21109462.

Almost surely, 2^84437842 is an apocalyptic number.

84437842 is a deficient number, since it is larger than the sum of its proper divisors (42218924).

84437842 is a wasteful number, since it uses less digits than its factorization.

84437842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42218923.

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

The square root of 84437842 is about 9189.0065839567. The cubic root of 84437842 is about 438.7115232639.

The spelling of 84437842 in words is "eighty-four million, four hundred thirty-seven thousand, eight hundred forty-two".