87816853 has 2 divisors, whose sum is σ = 87816854. Its totient is φ = 87816852.

The previous prime is 87816809. The next prime is 87816857. The reversal of 87816853 is 35861878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75377124 + 12439729 = 8682^2 + 3527^2 .

It is a cyclic number.

It is not a de Polignac number, because 87816853 - 2⁹ = 87816341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87816857) 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, 43908426 + 43908427.

It is an arithmetic number, because the mean of its divisors is an integer number (43908427).

Almost surely, 2^87816853 is an apocalyptic number.

It is an amenable number.

87816853 is a deficient number, since it is larger than the sum of its proper divisors (1).

87816853 is an equidigital number, since it uses as much as digits as its factorization.

87816853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 46.

The square root of 87816853 is about 9371.0646673684. The cubic root of 87816853 is about 444.4872316145.

The spelling of 87816853 in words is "eighty-seven million, eight hundred sixteen thousand, eight hundred fifty-three".