84904087 has 2 divisors, whose sum is σ = 84904088. Its totient is φ = 84904086.

The previous prime is 84904081. The next prime is 84904091. The reversal of 84904087 is 78040948.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84904087 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84904081) 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, 42452043 + 42452044.

It is an arithmetic number, because the mean of its divisors is an integer number (42452044).

Almost surely, 2^84904087 is an apocalyptic number.

84904087 is a deficient number, since it is larger than the sum of its proper divisors (1).

84904087 is an equidigital number, since it uses as much as digits as its factorization.

84904087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 84904087 is about 9214.3413763546. The cubic root of 84904087 is about 439.5175272776.

The spelling of 84904087 in words is "eighty-four million, nine hundred four thousand, eighty-seven".