80780027 has 4 divisors (see below), whose sum is σ = 82149240. Its totient is φ = 79410816.

The previous prime is 80780023. The next prime is 80780033. The reversal of 80780027 is 72008708.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80780027 - 2² = 80780023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80779975 and 80780002.

It is not an unprimeable number, because it can be changed into a prime (80780023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684518 + ... + 684635.

It is an arithmetic number, because the mean of its divisors is an integer number (20537310).

Almost surely, 2^80780027 is an apocalyptic number.

80780027 is a deficient number, since it is larger than the sum of its proper divisors (1369213).

80780027 is a wasteful number, since it uses less digits than its factorization.

80780027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369212.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 80780027 is about 8987.7709694896. The cubic root of 80780027 is about 432.2828419673.

The spelling of 80780027 in words is "eighty million, seven hundred eighty thousand, twenty-seven".