87708313549 has 2 divisors, whose sum is σ = 87708313550. Its totient is φ = 87708313548.

The previous prime is 87708313523. The next prime is 87708313591. The reversal of 87708313549 is 94531380778.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74676492900 + 13031820649 = 273270^2 + 114157^2 .

It is a cyclic number.

It is not a de Polignac number, because 87708313549 - 2²⁹ = 87171442637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87708313549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87708313249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43854156774 + 43854156775.

It is an arithmetic number, because the mean of its divisors is an integer number (43854156775).

Almost surely, 2^87708313549 is an apocalyptic number.

It is an amenable number.

87708313549 is a deficient number, since it is larger than the sum of its proper divisors (1).

87708313549 is an equidigital number, since it uses as much as digits as its factorization.

87708313549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 87708313549 in words is "eighty-seven billion, seven hundred eight million, three hundred thirteen thousand, five hundred forty-nine".