87012811 has 2 divisors, whose sum is σ = 87012812. Its totient is φ = 87012810.

The previous prime is 87012769. The next prime is 87012857. The reversal of 87012811 is 11821078.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87012811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87012811.

It is not a weakly prime, because it can be changed into another prime (87012011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43506405 + 43506406.

It is an arithmetic number, because the mean of its divisors is an integer number (43506406).

Almost surely, 2^87012811 is an apocalyptic number.

87012811 is a deficient number, since it is larger than the sum of its proper divisors (1).

87012811 is an equidigital number, since it uses as much as digits as its factorization.

87012811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 87012811 is about 9328.0657694937. The cubic root of 87012811 is about 443.1265105851.

Adding to 87012811 its reverse (11821078), we get a palindrome (98833889).

The spelling of 87012811 in words is "eighty-seven million, twelve thousand, eight hundred eleven".