78780743 has 2 divisors, whose sum is σ = 78780744. Its totient is φ = 78780742.

The previous prime is 78780719. The next prime is 78780763. The reversal of 78780743 is 34708787.

It is a strong prime.

It is an emirp because it is prime and its reverse (34708787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78780743 - 2¹⁶ = 78715207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78780694 and 78780703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78780763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39390371 + 39390372.

It is an arithmetic number, because the mean of its divisors is an integer number (39390372).

Almost surely, 2^78780743 is an apocalyptic number.

78780743 is a deficient number, since it is larger than the sum of its proper divisors (1).

78780743 is an equidigital number, since it uses as much as digits as its factorization.

78780743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 263424, while the sum is 44.

The square root of 78780743 is about 8875.8516774448. The cubic root of 78780743 is about 428.6867142182.

The spelling of 78780743 in words is "seventy-eight million, seven hundred eighty thousand, seven hundred forty-three".