84456487 has 2 divisors, whose sum is σ = 84456488. Its totient is φ = 84456486.

The previous prime is 84456481. The next prime is 84456499. The reversal of 84456487 is 78465448.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84456487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84456481) 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, 42228243 + 42228244.

It is an arithmetic number, because the mean of its divisors is an integer number (42228244).

Almost surely, 2^84456487 is an apocalyptic number.

84456487 is a deficient number, since it is larger than the sum of its proper divisors (1).

84456487 is an equidigital number, since it uses as much as digits as its factorization.

84456487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 860160, while the sum is 46.

The square root of 84456487 is about 9190.0210554710. The cubic root of 84456487 is about 438.7438120030.

The spelling of 84456487 in words is "eighty-four million, four hundred fifty-six thousand, four hundred eighty-seven".