87427975053509 has 2 divisors, whose sum is σ = 87427975053510. Its totient is φ = 87427975053508.

The previous prime is 87427975053437. The next prime is 87427975053511. The reversal of 87427975053509 is 90535057972478.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85050411509284 + 2377563544225 = 9222278^2 + 1541935^2 .

It is a cyclic number.

It is not a de Polignac number, because 87427975053509 - 2²⁸ = 87427706618053 is a prime.

Together with 87427975053511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87427975056509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43713987526754 + 43713987526755.

It is an arithmetic number, because the mean of its divisors is an integer number (43713987526755).

Almost surely, 2^{87427975053509} is an apocalyptic number.

It is an amenable number.

87427975053509 is a deficient number, since it is larger than the sum of its proper divisors (1).

87427975053509 is an equidigital number, since it uses as much as digits as its factorization.

87427975053509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 666792000, while the sum is 71.

The spelling of 87427975053509 in words is "eighty-seven trillion, four hundred twenty-seven billion, nine hundred seventy-five million, fifty-three thousand, five hundred nine".