80378677 has 2 divisors, whose sum is σ = 80378678. Its totient is φ = 80378676.

The previous prime is 80378651. The next prime is 80378719. The reversal of 80378677 is 77687308.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72488196 + 7890481 = 8514^2 + 2809^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80378677 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80373677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40189338 + 40189339.

It is an arithmetic number, because the mean of its divisors is an integer number (40189339).

Almost surely, 2^80378677 is an apocalyptic number.

It is an amenable number.

80378677 is a deficient number, since it is larger than the sum of its proper divisors (1).

80378677 is an equidigital number, since it uses as much as digits as its factorization.

80378677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 80378677 is about 8965.4156066520. The cubic root of 80378677 is about 431.5657305049.

The spelling of 80378677 in words is "eighty million, three hundred seventy-eight thousand, six hundred seventy-seven".