84242687 has 2 divisors, whose sum is σ = 84242688. Its totient is φ = 84242686.

The previous prime is 84242681. The next prime is 84242689. The reversal of 84242687 is 78624248.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84242687 - 2¹⁶ = 84177151 is a prime.

Together with 84242689, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84242681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42121343 + 42121344.

It is an arithmetic number, because the mean of its divisors is an integer number (42121344).

Almost surely, 2^84242687 is an apocalyptic number.

84242687 is a deficient number, since it is larger than the sum of its proper divisors (1).

84242687 is an equidigital number, since it uses as much as digits as its factorization.

84242687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172032, while the sum is 41.

The square root of 84242687 is about 9178.3815022040. The cubic root of 84242687 is about 438.3732752698.

It can be divided in two parts, 8424 and 2687, that added together give a palindrome (11111).

The spelling of 84242687 in words is "eighty-four million, two hundred forty-two thousand, six hundred eighty-seven".