78528787 has 2 divisors, whose sum is σ = 78528788. Its totient is φ = 78528786.

The previous prime is 78528761. The next prime is 78528829. The reversal of 78528787 is 78782587.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78528787 - 2¹¹ = 78526739 is a prime.

It is not a weakly prime, because it can be changed into another prime (78528887) 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, 39264393 + 39264394.

It is an arithmetic number, because the mean of its divisors is an integer number (39264394).

Almost surely, 2^78528787 is an apocalyptic number.

78528787 is a deficient number, since it is larger than the sum of its proper divisors (1).

78528787 is an equidigital number, since it uses as much as digits as its factorization.

78528787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1756160, while the sum is 52.

The square root of 78528787 is about 8861.6469688202. The cubic root of 78528787 is about 428.2292185728.

The spelling of 78528787 in words is "seventy-eight million, five hundred twenty-eight thousand, seven hundred eighty-seven".