87705144929 has 2 divisors, whose sum is σ = 87705144930. Its totient is φ = 87705144928.

The previous prime is 87705144797. The next prime is 87705144931. The reversal of 87705144929 is 92944150778.

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., 68259400225 + 19445744704 = 261265^2 + 139448^2 .

It is a cyclic number.

It is not a de Polignac number, because 87705144929 - 2⁸ = 87705144673 is a prime.

Together with 87705144931, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87705144529) 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, 43852572464 + 43852572465.

It is an arithmetic number, because the mean of its divisors is an integer number (43852572465).

Almost surely, 2^87705144929 is an apocalyptic number.

It is an amenable number.

87705144929 is a deficient number, since it is larger than the sum of its proper divisors (1).

87705144929 is an equidigital number, since it uses as much as digits as its factorization.

87705144929 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 56.

The spelling of 87705144929 in words is "eighty-seven billion, seven hundred five million, one hundred forty-four thousand, nine hundred twenty-nine".