78434711 has 2 divisors, whose sum is σ = 78434712. Its totient is φ = 78434710.

The previous prime is 78434701. The next prime is 78434729. The reversal of 78434711 is 11743487.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78434711 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78434701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39217355 + 39217356.

It is an arithmetic number, because the mean of its divisors is an integer number (39217356).

Almost surely, 2^78434711 is an apocalyptic number.

78434711 is a deficient number, since it is larger than the sum of its proper divisors (1).

78434711 is an equidigital number, since it uses as much as digits as its factorization.

78434711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 35.

The square root of 78434711 is about 8856.3373354903. The cubic root of 78434711 is about 428.0581467423.

The spelling of 78434711 in words is "seventy-eight million, four hundred thirty-four thousand, seven hundred eleven".