80078779 has 8 divisors (see below), whose sum is σ = 87485760. Its totient is φ = 72693000.

The previous prime is 80078777. The next prime is 80078783. The reversal of 80078779 is 97787008.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80078779 - 2¹ = 80078777 is a prime.

It is a super-2 number, since 2×80078779² = 12825221692261682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80078777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3204 + ... + 13054.

It is an arithmetic number, because the mean of its divisors is an integer number (10935720).

Almost surely, 2^80078779 is an apocalyptic number.

80078779 is a deficient number, since it is larger than the sum of its proper divisors (7406981).

80078779 is a wasteful number, since it uses less digits than its factorization.

80078779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10601.

The product of its (nonzero) digits is 197568, while the sum is 46.

The square root of 80078779 is about 8948.6747063462. The cubic root of 80078779 is about 431.0283284477.

The spelling of 80078779 in words is "eighty million, seventy-eight thousand, seven hundred seventy-nine".