78625387 has 4 divisors (see below), whose sum is σ = 79436056. Its totient is φ = 77814720.

The previous prime is 78625373. The next prime is 78625403. The reversal of 78625387 is 78352687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78352687 = 7 ⋅11193241.

It is a cyclic number.

It is not a de Polignac number, because 78625387 - 2¹⁹ = 78101099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78625367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405189 + ... + 405382.

It is an arithmetic number, because the mean of its divisors is an integer number (19859014).

Almost surely, 2^78625387 is an apocalyptic number.

78625387 is a deficient number, since it is larger than the sum of its proper divisors (810669).

78625387 is an equidigital number, since it uses as much as digits as its factorization.

78625387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810668.

The product of its digits is 564480, while the sum is 46.

The square root of 78625387 is about 8867.0957477632. The cubic root of 78625387 is about 428.4047380375.

The spelling of 78625387 in words is "seventy-eight million, six hundred twenty-five thousand, three hundred eighty-seven".