87999737893 has 2 divisors, whose sum is σ = 87999737894. Its totient is φ = 87999737892.

The previous prime is 87999737827. The next prime is 87999737897. The reversal of 87999737893 is 39873799978.

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., 86455405089 + 1544332804 = 294033^2 + 39298^2 .

It is a cyclic number.

It is not a de Polignac number, because 87999737893 - 2⁹ = 87999737381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87999737897) 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, 43999868946 + 43999868947.

It is an arithmetic number, because the mean of its divisors is an integer number (43999868947).

Almost surely, 2^87999737893 is an apocalyptic number.

It is an amenable number.

87999737893 is a deficient number, since it is larger than the sum of its proper divisors (1).

87999737893 is an equidigital number, since it uses as much as digits as its factorization.

87999737893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296243648, while the sum is 79.

The spelling of 87999737893 in words is "eighty-seven billion, nine hundred ninety-nine million, seven hundred thirty-seven thousand, eight hundred ninety-three".