78724411 has 2 divisors, whose sum is σ = 78724412. Its totient is φ = 78724410.

The previous prime is 78724361. The next prime is 78724417. The reversal of 78724411 is 11442787.

It is a strong prime.

It is an emirp because it is prime and its reverse (11442787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78724411 - 2¹³ = 78716219 is a prime.

It is not a weakly prime, because it can be changed into another prime (78724417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39362205 + 39362206.

It is an arithmetic number, because the mean of its divisors is an integer number (39362206).

Almost surely, 2^78724411 is an apocalyptic number.

78724411 is a deficient number, since it is larger than the sum of its proper divisors (1).

78724411 is an equidigital number, since it uses as much as digits as its factorization.

78724411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12544, while the sum is 34.

The square root of 78724411 is about 8872.6777806928. The cubic root of 78724411 is about 428.5845126852.

The spelling of 78724411 in words is "seventy-eight million, seven hundred twenty-four thousand, four hundred eleven".