84470899 has 2 divisors, whose sum is σ = 84470900. Its totient is φ = 84470898.

The previous prime is 84470863. The next prime is 84470921. The reversal of 84470899 is 99807448.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84470899 - 2⁹ = 84470387 is a prime.

It is not a weakly prime, because it can be changed into another prime (84470809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42235449 + 42235450.

It is an arithmetic number, because the mean of its divisors is an integer number (42235450).

Almost surely, 2^84470899 is an apocalyptic number.

84470899 is a deficient number, since it is larger than the sum of its proper divisors (1).

84470899 is an equidigital number, since it uses as much as digits as its factorization.

84470899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 84470899 is about 9190.8051333928. The cubic root of 84470899 is about 438.7687669291.

The spelling of 84470899 in words is "eighty-four million, four hundred seventy thousand, eight hundred ninety-nine".