80778127 has 2 divisors, whose sum is σ = 80778128. Its totient is φ = 80778126.

The previous prime is 80778121. The next prime is 80778133. The reversal of 80778127 is 72187708.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (80778121) and next prime (80778133).

It is a cyclic number.

It is not a de Polignac number, because 80778127 - 2¹¹ = 80776079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80778127.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80778121) 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, 40389063 + 40389064.

It is an arithmetic number, because the mean of its divisors is an integer number (40389064).

Almost surely, 2^80778127 is an apocalyptic number.

80778127 is a deficient number, since it is larger than the sum of its proper divisors (1).

80778127 is an equidigital number, since it uses as much as digits as its factorization.

80778127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43904, while the sum is 40.

The square root of 80778127 is about 8987.6652696905. The cubic root of 80778127 is about 432.2794527473.

The spelling of 80778127 in words is "eighty million, seven hundred seventy-eight thousand, one hundred twenty-seven".