87342527809 has 2 divisors, whose sum is σ = 87342527810. Its totient is φ = 87342527808.

The previous prime is 87342527791. The next prime is 87342527893. The reversal of 87342527809 is 90872524378.

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., 80270222400 + 7072305409 = 283320^2 + 84097^2 .

It is a cyclic number.

It is not a de Polignac number, because 87342527809 - 2⁷ = 87342527681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87342527809.

It is not a weakly prime, because it can be changed into another prime (87342527009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43671263904 + 43671263905.

It is an arithmetic number, because the mean of its divisors is an integer number (43671263905).

Almost surely, 2^87342527809 is an apocalyptic number.

It is an amenable number.

87342527809 is a deficient number, since it is larger than the sum of its proper divisors (1).

87342527809 is an equidigital number, since it uses as much as digits as its factorization.

87342527809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6773760, while the sum is 55.

The spelling of 87342527809 in words is "eighty-seven billion, three hundred forty-two million, five hundred twenty-seven thousand, eight hundred nine".