87691074213073 has 2 divisors, whose sum is σ = 87691074213074. Its totient is φ = 87691074213072.

The previous prime is 87691074213031. The next prime is 87691074213089. The reversal of 87691074213073 is 37031247019678.

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., 56130408632529 + 31560665580544 = 7492023^2 + 5617888^2 .

It is a cyclic number.

It is not a de Polignac number, because 87691074213073 - 2²¹ = 87691072115921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87691074212999 and 87691074213017.

It is not a weakly prime, because it can be changed into another prime (87691074273073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43845537106536 + 43845537106537.

It is an arithmetic number, because the mean of its divisors is an integer number (43845537106537).

Almost surely, 2^{87691074213073} is an apocalyptic number.

It is an amenable number.

87691074213073 is a deficient number, since it is larger than the sum of its proper divisors (1).

87691074213073 is an equidigital number, since it uses as much as digits as its factorization.

87691074213073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10668672, while the sum is 58.

The spelling of 87691074213073 in words is "eighty-seven trillion, six hundred ninety-one billion, seventy-four million, two hundred thirteen thousand, seventy-three".