78678995 has 4 divisors (see below), whose sum is σ = 94414800. Its totient is φ = 62943192.

The previous prime is 78678989. The next prime is 78679033. The reversal of 78678995 is 59987687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59987687 = 71 ⋅844897.

It is a cyclic number.

It is not a de Polignac number, because 78678995 - 2¹⁰ = 78677971 is a prime.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 7867895 + ... + 7867904.

It is an arithmetic number, because the mean of its divisors is an integer number (23603700).

Almost surely, 2^78678995 is an apocalyptic number.

78678995 is a deficient number, since it is larger than the sum of its proper divisors (15735805).

78678995 is a wasteful number, since it uses less digits than its factorization.

78678995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15735804.

The product of its digits is 7620480, while the sum is 59.

The square root of 78678995 is about 8870.1180939151. The cubic root of 78678995 is about 428.5020802342.

The spelling of 78678995 in words is "seventy-eight million, six hundred seventy-eight thousand, nine hundred ninety-five".