87124138313 has 2 divisors, whose sum is σ = 87124138314. Its totient is φ = 87124138312.

The previous prime is 87124138267. The next prime is 87124138319. The reversal of 87124138313 is 31383142178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57690275344 + 29433862969 = 240188^2 + 171563^2 .

It is a cyclic number.

It is not a de Polignac number, because 87124138313 - 2³⁶ = 18404661577 is a prime.

It is not a weakly prime, because it can be changed into another prime (87124138319) 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 as a sum of consecutive naturals, namely, 43562069156 + 43562069157.

It is an arithmetic number, because the mean of its divisors is an integer number (43562069157).

Almost surely, 2^87124138313 is an apocalyptic number.

It is an amenable number.

87124138313 is a deficient number, since it is larger than the sum of its proper divisors (1).

87124138313 is an equidigital number, since it uses as much as digits as its factorization.

87124138313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 41.

The spelling of 87124138313 in words is "eighty-seven billion, one hundred twenty-four million, one hundred thirty-eight thousand, three hundred thirteen".