87875973509 has 2 divisors, whose sum is σ = 87875973510. Its totient is φ = 87875973508.

The previous prime is 87875973499. The next prime is 87875973511. The reversal of 87875973509 is 90537957878.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56270956225 + 31605017284 = 237215^2 + 177778^2 .

It is a cyclic number.

It is not a de Polignac number, because 87875973509 - 2³⁶ = 19156496773 is a prime.

Together with 87875973511, 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 (87875973539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43937986754 + 43937986755.

It is an arithmetic number, because the mean of its divisors is an integer number (43937986755).

Almost surely, 2^87875973509 is an apocalyptic number.

It is an amenable number.

87875973509 is a deficient number, since it is larger than the sum of its proper divisors (1).

87875973509 is an equidigital number, since it uses as much as digits as its factorization.

87875973509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 133358400, while the sum is 68.

The spelling of 87875973509 in words is "eighty-seven billion, eight hundred seventy-five million, nine hundred seventy-three thousand, five hundred nine".