87124811 has 2 divisors, whose sum is σ = 87124812. Its totient is φ = 87124810.

The previous prime is 87124781. The next prime is 87124871. The reversal of 87124811 is 11842178.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87124811 - 2¹⁸ = 86862667 is a prime.

It is not a weakly prime, because it can be changed into another prime (87124871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43562405 + 43562406.

It is an arithmetic number, because the mean of its divisors is an integer number (43562406).

Almost surely, 2^87124811 is an apocalyptic number.

87124811 is a deficient number, since it is larger than the sum of its proper divisors (1).

87124811 is an equidigital number, since it uses as much as digits as its factorization.

87124811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3584, while the sum is 32.

The square root of 87124811 is about 9334.0672270988. The cubic root of 87124811 is about 443.3165549771.

Adding to 87124811 its reverse (11842178), we get a palindrome (98966989).

The spelling of 87124811 in words is "eighty-seven million, one hundred twenty-four thousand, eight hundred eleven".