78000011 has 2 divisors, whose sum is σ = 78000012. Its totient is φ = 78000010.

The previous prime is 78000001. The next prime is 78000017. The reversal of 78000011 is 11000087.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78000011 - 2¹⁸ = 77737867 is a prime.

It is not a weakly prime, because it can be changed into another prime (78000017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39000005 + 39000006.

It is an arithmetic number, because the mean of its divisors is an integer number (39000006).

Almost surely, 2^78000011 is an apocalyptic number.

78000011 is a deficient number, since it is larger than the sum of its proper divisors (1).

78000011 is an equidigital number, since it uses as much as digits as its factorization.

78000011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 78000011 is about 8831.7614890802. The cubic root of 78000011 is about 427.2658882549.

Adding to 78000011 its reverse (11000087), we get a palindrome (89000098).

The spelling of 78000011 in words is "seventy-eight million, eleven", and thus it is an aban number and an uban number.