78584087 has 2 divisors, whose sum is σ = 78584088. Its totient is φ = 78584086.

The previous prime is 78584071. The next prime is 78584119. The reversal of 78584087 is 78048587.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78584087 - 2⁴ = 78584071 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 (78584027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39292043 + 39292044.

It is an arithmetic number, because the mean of its divisors is an integer number (39292044).

Almost surely, 2^78584087 is an apocalyptic number.

78584087 is a deficient number, since it is larger than the sum of its proper divisors (1).

78584087 is an equidigital number, since it uses as much as digits as its factorization.

78584087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 501760, while the sum is 47.

The square root of 78584087 is about 8864.7666071928. The cubic root of 78584087 is about 428.3297147098.

The spelling of 78584087 in words is "seventy-eight million, five hundred eighty-four thousand, eighty-seven".