87122169 has 16 divisors (see below), whose sum is σ = 129571200. Its totient is φ = 57855888.

The previous prime is 87122153. The next prime is 87122219. The reversal of 87122169 is 96122178.

It is not a de Polignac number, because 87122169 - 2⁴ = 87122153 is a prime.

It is a super-2 number, since 2×87122169² = 15180544662529122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87122129) 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 in 15 ways as a sum of consecutive naturals, for example, 967 + ... + 13235.

It is an arithmetic number, because the mean of its divisors is an integer number (8098200).

Almost surely, 2^87122169 is an apocalyptic number.

It is an amenable number.

87122169 is a deficient number, since it is larger than the sum of its proper divisors (42449031).

87122169 is a wasteful number, since it uses less digits than its factorization.

87122169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12541 (or 12535 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 87122169 is about 9333.9257014399. The cubic root of 87122169 is about 443.3120738419.

Subtracting 87122169 from its reverse (96122178), we obtain a palindrome (9000009).

The spelling of 87122169 in words is "eighty-seven million, one hundred twenty-two thousand, one hundred sixty-nine".