78744943 has 2 divisors, whose sum is σ = 78744944. Its totient is φ = 78744942.

The previous prime is 78744937. The next prime is 78744971. The reversal of 78744943 is 34944787.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78744943 - 2²⁵ = 45190511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78744893 and 78744902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78744923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39372471 + 39372472.

It is an arithmetic number, because the mean of its divisors is an integer number (39372472).

Almost surely, 2^78744943 is an apocalyptic number.

78744943 is a deficient number, since it is larger than the sum of its proper divisors (1).

78744943 is an equidigital number, since it uses as much as digits as its factorization.

78744943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 46.

The square root of 78744943 is about 8873.8347404039. The cubic root of 78744943 is about 428.6217689492.

The spelling of 78744943 in words is "seventy-eight million, seven hundred forty-four thousand, nine hundred forty-three".