87540305 has 8 divisors (see below), whose sum is σ = 105312744. Its totient is φ = 69856000.

The previous prime is 87540301. The next prime is 87540319. The reversal of 87540305 is 50304578.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 52765696 + 34774609 = 7264^2 + 5897^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87540305 - 2² = 87540301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87540301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19826 + ... + 23835.

It is an arithmetic number, because the mean of its divisors is an integer number (13164093).

Almost surely, 2^87540305 is an apocalyptic number.

It is an amenable number.

87540305 is a deficient number, since it is larger than the sum of its proper divisors (17772439).

87540305 is a wasteful number, since it uses less digits than its factorization.

87540305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44067.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 87540305 is about 9356.2976117693. The cubic root of 87540305 is about 444.0201560663.

The spelling of 87540305 in words is "eighty-seven million, five hundred forty thousand, three hundred five".