78831827 has 2 divisors, whose sum is σ = 78831828. Its totient is φ = 78831826.

The previous prime is 78831799. The next prime is 78831859. The reversal of 78831827 is 72813887.

It is a weak prime.

It is an emirp because it is prime and its reverse (72813887) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78831827 - 2¹² = 78827731 is a prime.

It is not a weakly prime, because it can be changed into another prime (78833827) 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, 39415913 + 39415914.

It is an arithmetic number, because the mean of its divisors is an integer number (39415914).

Almost surely, 2^78831827 is an apocalyptic number.

78831827 is a deficient number, since it is larger than the sum of its proper divisors (1).

78831827 is an equidigital number, since it uses as much as digits as its factorization.

78831827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150528, while the sum is 44.

The square root of 78831827 is about 8878.7289067749. The cubic root of 78831827 is about 428.7793523411.

The spelling of 78831827 in words is "seventy-eight million, eight hundred thirty-one thousand, eight hundred twenty-seven".