80415779 has 2 divisors, whose sum is σ = 80415780. Its totient is φ = 80415778.

The previous prime is 80415749. The next prime is 80415821. The reversal of 80415779 is 97751408.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80415779 - 2²⁴ = 63638563 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80415749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40207889 + 40207890.

It is an arithmetic number, because the mean of its divisors is an integer number (40207890).

Almost surely, 2^80415779 is an apocalyptic number.

80415779 is a deficient number, since it is larger than the sum of its proper divisors (1).

80415779 is an equidigital number, since it uses as much as digits as its factorization.

80415779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 80415779 is about 8967.4845413862. The cubic root of 80415779 is about 431.6321224442.

The spelling of 80415779 in words is "eighty million, four hundred fifteen thousand, seven hundred seventy-nine".