87814654909 has 2 divisors, whose sum is σ = 87814654910. Its totient is φ = 87814654908.

The previous prime is 87814654903. The next prime is 87814654987. The reversal of 87814654909 is 90945641878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86625439684 + 1189215225 = 294322^2 + 34485^2 .

It is a cyclic number.

It is not a de Polignac number, because 87814654909 - 2²⁷ = 87680437181 is a prime.

It is a super-2 number, since 2×87814654909² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87814654903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43907327454 + 43907327455.

It is an arithmetic number, because the mean of its divisors is an integer number (43907327455).

Almost surely, 2^87814654909 is an apocalyptic number.

It is an amenable number.

87814654909 is a deficient number, since it is larger than the sum of its proper divisors (1).

87814654909 is an equidigital number, since it uses as much as digits as its factorization.

87814654909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17418240, while the sum is 61.

The spelling of 87814654909 in words is "eighty-seven billion, eight hundred fourteen million, six hundred fifty-four thousand, nine hundred nine".