78804611 has 2 divisors, whose sum is σ = 78804612. Its totient is φ = 78804610.

The previous prime is 78804559. The next prime is 78804613. The reversal of 78804611 is 11640887.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78804611 - 2⁶ = 78804547 is a prime.

It is a super-2 number, since 2×78804611² = 12420333429722642, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 78804613, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78804613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39402305 + 39402306.

It is an arithmetic number, because the mean of its divisors is an integer number (39402306).

Almost surely, 2^78804611 is an apocalyptic number.

78804611 is a deficient number, since it is larger than the sum of its proper divisors (1).

78804611 is an equidigital number, since it uses as much as digits as its factorization.

78804611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 78804611 is about 8877.1961226504. The cubic root of 78804611 is about 428.7300025523.

The spelling of 78804611 in words is "seventy-eight million, eight hundred four thousand, six hundred eleven".