80779005 has 16 divisors (see below), whose sum is σ = 143607360. Its totient is φ = 43082064.

The previous prime is 80778991. The next prime is 80779021. The reversal of 80779005 is 50097708.

It is not a de Polignac number, because 80779005 - 2⁴ = 80778989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299047 + ... + 299316.

It is an arithmetic number, because the mean of its divisors is an integer number (8975460).

Almost surely, 2^80779005 is an apocalyptic number.

It is an amenable number.

80779005 is a deficient number, since it is larger than the sum of its proper divisors (62828355).

80779005 is a wasteful number, since it uses less digits than its factorization.

80779005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598377 (or 598371 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 80779005 is about 8987.7141142784. The cubic root of 80779005 is about 432.2810189303.

The spelling of 80779005 in words is "eighty million, seven hundred seventy-nine thousand, five".