78597987 has 16 divisors (see below), whose sum is σ = 119498400. Its totient is φ = 45522432.

The previous prime is 78597913. The next prime is 78597997. The reversal of 78597987 is 78979587.

It is not a de Polignac number, because 78597987 - 2¹² = 78593891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78597987.

It is not an unprimeable number, because it can be changed into a prime (78597907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58612 + ... + 59937.

It is an arithmetic number, because the mean of its divisors is an integer number (7468650).

Almost surely, 2^78597987 is an apocalyptic number.

78597987 is a deficient number, since it is larger than the sum of its proper divisors (40900413).

78597987 is a wasteful number, since it uses less digits than its factorization.

78597987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118582.

The product of its digits is 8890560, while the sum is 60.

The square root of 78597987 is about 8865.5505751194. The cubic root of 78597987 is about 428.3549676258.

The spelling of 78597987 in words is "seventy-eight million, five hundred ninety-seven thousand, nine hundred eighty-seven".