78903620923 has 2 divisors, whose sum is σ = 78903620924. Its totient is φ = 78903620922.

The previous prime is 78903620893. The next prime is 78903620981. The reversal of 78903620923 is 32902630987.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78903620923 is a prime.

It is not a weakly prime, because it can be changed into another prime (78903650923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39451810461 + 39451810462.

It is an arithmetic number, because the mean of its divisors is an integer number (39451810462).

Almost surely, 2^78903620923 is an apocalyptic number.

78903620923 is a deficient number, since it is larger than the sum of its proper divisors (1).

78903620923 is an equidigital number, since it uses as much as digits as its factorization.

78903620923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 49.

The spelling of 78903620923 in words is "seventy-eight billion, nine hundred three million, six hundred twenty thousand, nine hundred twenty-three".