78023587 has 2 divisors, whose sum is σ = 78023588. Its totient is φ = 78023586.

The previous prime is 78023581. The next prime is 78023597. The reversal of 78023587 is 78532087.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78023587 - 2⁷ = 78023459 is a prime.

It is not a weakly prime, because it can be changed into another prime (78023581) 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, 39011793 + 39011794.

It is an arithmetic number, because the mean of its divisors is an integer number (39011794).

Almost surely, 2^78023587 is an apocalyptic number.

78023587 is a deficient number, since it is larger than the sum of its proper divisors (1).

78023587 is an equidigital number, since it uses as much as digits as its factorization.

78023587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 78023587 is about 8833.0961163117. The cubic root of 78023587 is about 427.3089318636.

The spelling of 78023587 in words is "seventy-eight million, twenty-three thousand, five hundred eighty-seven".