87943432905 has 48 divisors (see below), whose sum is σ = 153476603280. Its totient is φ = 46583599104.

The previous prime is 87943432903. The next prime is 87943432919. The reversal of 87943432905 is 50923434978.

87943432905 is a `hidden beast` number, since 8 + 7 + 9 + 4 + 343 + 290 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 12507514569 + 75435918336 = 111837^2 + 274656^2 .

It is not a de Polignac number, because 87943432905 - 2¹ = 87943432903 is a prime.

It is a super-2 number, since 2×87943432905² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87943432903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5248581 + ... + 5265309.

It is an arithmetic number, because the mean of its divisors is an integer number (3197429235).

Almost surely, 2^87943432905 is an apocalyptic number.

It is an amenable number.

87943432905 is a deficient number, since it is larger than the sum of its proper divisors (65533170375).

87943432905 is a wasteful number, since it uses less digits than its factorization.

87943432905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17530 (or 17527 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 87943432905 in words is "eighty-seven billion, nine hundred forty-three million, four hundred thirty-two thousand, nine hundred five".