78793823 has 2 divisors, whose sum is σ = 78793824. Its totient is φ = 78793822.

The previous prime is 78793807. The next prime is 78793829. The reversal of 78793823 is 32839787.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78793823 - 2⁴ = 78793807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78793829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39396911 + 39396912.

It is an arithmetic number, because the mean of its divisors is an integer number (39396912).

Almost surely, 2^78793823 is an apocalyptic number.

78793823 is a deficient number, since it is larger than the sum of its proper divisors (1).

78793823 is an equidigital number, since it uses as much as digits as its factorization.

78793823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 47.

The square root of 78793823 is about 8876.5884775628. The cubic root of 78793823 is about 428.7104379173.

The spelling of 78793823 in words is "seventy-eight million, seven hundred ninety-three thousand, eight hundred twenty-three".