78801923 has 2 divisors, whose sum is σ = 78801924. Its totient is φ = 78801922.

The previous prime is 78801869. The next prime is 78802013. The reversal of 78801923 is 32910887.

It is a weak prime.

It is an emirp because it is prime and its reverse (32910887) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78801923 - 2⁶ = 78801859 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (78801623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39400961 + 39400962.

It is an arithmetic number, because the mean of its divisors is an integer number (39400962).

Almost surely, 2^78801923 is an apocalyptic number.

78801923 is a deficient number, since it is larger than the sum of its proper divisors (1).

78801923 is an equidigital number, since it uses as much as digits as its factorization.

78801923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 78801923 is about 8877.0447222034. The cubic root of 78801923 is about 428.7251278825.

The spelling of 78801923 in words is "seventy-eight million, eight hundred one thousand, nine hundred twenty-three".