87084405709 has 4 divisors (see below), whose sum is σ = 99525035104. Its totient is φ = 74643776316.

The previous prime is 87084405697. The next prime is 87084405731. The reversal of 87084405709 is 90750448078.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87084405709 - 2¹⁹ = 87083881421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87084405409) 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 in 3 ways as a sum of consecutive naturals, for example, 6220314687 + ... + 6220314700.

It is an arithmetic number, because the mean of its divisors is an integer number (24881258776).

Almost surely, 2^87084405709 is an apocalyptic number.

It is an amenable number.

87084405709 is a deficient number, since it is larger than the sum of its proper divisors (12440629395).

87084405709 is a wasteful number, since it uses less digits than its factorization.

87084405709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12440629394.

The product of its (nonzero) digits is 2257920, while the sum is 52.

The spelling of 87084405709 in words is "eighty-seven billion, eighty-four million, four hundred five thousand, seven hundred nine".