78734011 has 2 divisors, whose sum is σ = 78734012. Its totient is φ = 78734010.

The previous prime is 78734003. The next prime is 78734023. The reversal of 78734011 is 11043787.

It is a weak prime.

It is an emirp because it is prime and its reverse (11043787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78734011 - 2³ = 78734003 is a prime.

It is not a weakly prime, because it can be changed into another prime (78734111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39367005 + 39367006.

It is an arithmetic number, because the mean of its divisors is an integer number (39367006).

Almost surely, 2^78734011 is an apocalyptic number.

78734011 is a deficient number, since it is larger than the sum of its proper divisors (1).

78734011 is an equidigital number, since it uses as much as digits as its factorization.

78734011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 78734011 is about 8873.2187508254. The cubic root of 78734011 is about 428.6019331356.

Adding to 78734011 its reverse (11043787), we get a palindrome (89777798).

The spelling of 78734011 in words is "seventy-eight million, seven hundred thirty-four thousand, eleven".