87192918613 has 2 divisors, whose sum is σ = 87192918614. Its totient is φ = 87192918612.

The previous prime is 87192918559. The next prime is 87192918619. The reversal of 87192918613 is 31681929178.

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., 59383353969 + 27809564644 = 243687^2 + 166762^2 .

It is a cyclic number.

It is not a de Polignac number, because 87192918613 - 2²⁹ = 86656047701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87192918619) 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, 43596459306 + 43596459307.

It is an arithmetic number, because the mean of its divisors is an integer number (43596459307).

Almost surely, 2^87192918613 is an apocalyptic number.

It is an amenable number.

87192918613 is a deficient number, since it is larger than the sum of its proper divisors (1).

87192918613 is an equidigital number, since it uses as much as digits as its factorization.

87192918613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 55.

The spelling of 87192918613 in words is "eighty-seven billion, one hundred ninety-two million, nine hundred eighteen thousand, six hundred thirteen".