87161811 has 16 divisors (see below), whose sum is σ = 126985728. Its totient is φ = 52740000.

The previous prime is 87161803. The next prime is 87161831. The reversal of 87161811 is 11816178.

It is not a de Polignac number, because 87161811 - 2³ = 87161803 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (87161831) 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 in 15 ways as a sum of consecutive naturals, for example, 23025 + ... + 26541.

It is an arithmetic number, because the mean of its divisors is an integer number (7936608).

Almost surely, 2^87161811 is an apocalyptic number.

87161811 is a deficient number, since it is larger than the sum of its proper divisors (39823917).

87161811 is a wasteful number, since it uses less digits than its factorization.

87161811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4282.

The product of its digits is 2688, while the sum is 33.

The square root of 87161811 is about 9336.0490037274. The cubic root of 87161811 is about 443.3793017077.

Adding to 87161811 its reverse (11816178), we get a palindrome (98977989).

The spelling of 87161811 in words is "eighty-seven million, one hundred sixty-one thousand, eight hundred eleven".