80587777 has 2 divisors, whose sum is σ = 80587778. Its totient is φ = 80587776.

The previous prime is 80587763. The next prime is 80587811. The reversal of 80587777 is 77778508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44635761 + 35952016 = 6681^2 + 5996^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80587777 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80587777.

It is not a weakly prime, because it can be changed into another prime (80587757) 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, 40293888 + 40293889.

It is an arithmetic number, because the mean of its divisors is an integer number (40293889).

Almost surely, 2^80587777 is an apocalyptic number.

It is an amenable number.

80587777 is a deficient number, since it is larger than the sum of its proper divisors (1).

80587777 is an equidigital number, since it uses as much as digits as its factorization.

80587777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768320, while the sum is 49.

The square root of 80587777 is about 8977.0695107034. The cubic root of 80587777 is about 431.9396366990.

The spelling of 80587777 in words is "eighty million, five hundred eighty-seven thousand, seven hundred seventy-seven".