78468833 has 2 divisors, whose sum is σ = 78468834. Its totient is φ = 78468832.

The previous prime is 78468769. The next prime is 78468839. The reversal of 78468833 is 33886487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75203584 + 3265249 = 8672^2 + 1807^2 .

It is a cyclic number.

It is not a de Polignac number, because 78468833 - 2⁶ = 78468769 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (78468839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39234416 + 39234417.

It is an arithmetic number, because the mean of its divisors is an integer number (39234417).

Almost surely, 2^78468833 is an apocalyptic number.

It is an amenable number.

78468833 is a deficient number, since it is larger than the sum of its proper divisors (1).

78468833 is an equidigital number, since it uses as much as digits as its factorization.

78468833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 47.

The square root of 78468833 is about 8858.2635431556. The cubic root of 78468833 is about 428.1202114512.

The spelling of 78468833 in words is "seventy-eight million, four hundred sixty-eight thousand, eight hundred thirty-three".