78623963 has 16 divisors (see below), whose sum is σ = 92542176. Its totient is φ = 65994240.

The previous prime is 78623953. The next prime is 78623969. The reversal of 78623963 is 36932687.

It is a cyclic number.

It is not a de Polignac number, because 78623963 - 2¹⁶ = 78558427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78623969) 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 15 ways as a sum of consecutive naturals, for example, 5945 + ... + 13877.

It is an arithmetic number, because the mean of its divisors is an integer number (5783886).

Almost surely, 2^78623963 is an apocalyptic number.

78623963 is a deficient number, since it is larger than the sum of its proper divisors (13918213).

78623963 is a wasteful number, since it uses less digits than its factorization.

78623963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8014.

The product of its digits is 326592, while the sum is 44.

The square root of 78623963 is about 8867.0154505335. The cubic root of 78623963 is about 428.4021517141.

The spelling of 78623963 in words is "seventy-eight million, six hundred twenty-three thousand, nine hundred sixty-three".