84470647 has 2 divisors, whose sum is σ = 84470648. Its totient is φ = 84470646.

The previous prime is 84470641. The next prime is 84470657. The reversal of 84470647 is 74607448.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84470647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84470641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42235323 + 42235324.

It is an arithmetic number, because the mean of its divisors is an integer number (42235324).

Almost surely, 2^84470647 is an apocalyptic number.

84470647 is a deficient number, since it is larger than the sum of its proper divisors (1).

84470647 is an equidigital number, since it uses as much as digits as its factorization.

84470647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150528, while the sum is 40.

The square root of 84470647 is about 9190.7914240287. The cubic root of 84470647 is about 438.7683306059.

The spelling of 84470647 in words is "eighty-four million, four hundred seventy thousand, six hundred forty-seven".