78968787 has 4 divisors (see below), whose sum is σ = 105291720. Its totient is φ = 52645856.

The previous prime is 78968783. The next prime is 78968803. The reversal of 78968787 is 78786987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78786987 = 3 ⋅26262329.

It is a cyclic number.

It is not a de Polignac number, because 78968787 - 2² = 78968783 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78968787.

It is not an unprimeable number, because it can be changed into a prime (78968783) 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, 13161462 + ... + 13161467.

It is an arithmetic number, because the mean of its divisors is an integer number (26322930).

Almost surely, 2^78968787 is an apocalyptic number.

78968787 is a deficient number, since it is larger than the sum of its proper divisors (26322933).

78968787 is a wasteful number, since it uses less digits than its factorization.

78968787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26322932.

The product of its digits is 9483264, while the sum is 60.

The square root of 78968787 is about 8886.4383754123. The cubic root of 78968787 is about 429.0275247091.

The spelling of 78968787 in words is "seventy-eight million, nine hundred sixty-eight thousand, seven hundred eighty-seven".