87031757170789 has 2 divisors, whose sum is σ = 87031757170790. Its totient is φ = 87031757170788.

The previous prime is 87031757170769. The next prime is 87031757170843. The reversal of 87031757170789 is 98707175713078.

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., 50546653886689 + 36485103284100 = 7109617^2 + 6040290^2 .

It is a cyclic number.

It is not a de Polignac number, because 87031757170789 - 2⁹ = 87031757170277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87031757170769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43515878585394 + 43515878585395.

It is an arithmetic number, because the mean of its divisors is an integer number (43515878585395).

Almost surely, 2^{87031757170789} is an apocalyptic number.

It is an amenable number.

87031757170789 is a deficient number, since it is larger than the sum of its proper divisors (1).

87031757170789 is an equidigital number, since it uses as much as digits as its factorization.

87031757170789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145212480, while the sum is 70.

The spelling of 87031757170789 in words is "eighty-seven trillion, thirty-one billion, seven hundred fifty-seven million, one hundred seventy thousand, seven hundred eighty-nine".