87476777 has 2 divisors, whose sum is σ = 87476778. Its totient is φ = 87476776.

The previous prime is 87476773. The next prime is 87476791. The reversal of 87476777 is 77767478.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43771456 + 43705321 = 6616^2 + 6611^2 .

It is a cyclic number.

It is not a de Polignac number, because 87476777 - 2² = 87476773 is a prime.

It is not a weakly prime, because it can be changed into another prime (87476773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43738388 + 43738389.

It is an arithmetic number, because the mean of its divisors is an integer number (43738389).

Almost surely, 2^87476777 is an apocalyptic number.

It is an amenable number.

87476777 is a deficient number, since it is larger than the sum of its proper divisors (1).

87476777 is an equidigital number, since it uses as much as digits as its factorization.

87476777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3226944, while the sum is 53.

The square root of 87476777 is about 9352.9020629963. The cubic root of 87476777 is about 443.9127215968.

The spelling of 87476777 in words is "eighty-seven million, four hundred seventy-six thousand, seven hundred seventy-seven".