87320438884373 has 2 divisors, whose sum is σ = 87320438884374. Its totient is φ = 87320438884372.

The previous prime is 87320438884307. The next prime is 87320438884391. The reversal of 87320438884373 is 37348883402378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79294447896049 + 8025990988324 = 8904743^2 + 2833018^2 .

It is a cyclic number.

It is not a de Polignac number, because 87320438884373 - 2²⁰ = 87320437835797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87320438880373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43660219442186 + 43660219442187.

It is an arithmetic number, because the mean of its divisors is an integer number (43660219442187).

Almost surely, 2^{87320438884373} is an apocalyptic number.

It is an amenable number.

87320438884373 is a deficient number, since it is larger than the sum of its proper divisors (1).

87320438884373 is an equidigital number, since it uses as much as digits as its factorization.

87320438884373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 520224768, while the sum is 68.

The spelling of 87320438884373 in words is "eighty-seven trillion, three hundred twenty billion, four hundred thirty-eight million, eight hundred eighty-four thousand, three hundred seventy-three".