87750005 has 32 divisors (see below), whose sum is σ = 128459520. Its totient is φ = 56171520.

The previous prime is 87750001. The next prime is 87750017. The reversal of 87750005 is 50005778.

It is not a de Polignac number, because 87750005 - 2² = 87750001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87750001) 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 31 ways as a sum of consecutive naturals, for example, 82175 + ... + 83235.

It is an arithmetic number, because the mean of its divisors is an integer number (4014360).

Almost surely, 2^87750005 is an apocalyptic number.

87750005 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

87750005 is a deficient number, since it is larger than the sum of its proper divisors (40709515).

87750005 is a wasteful number, since it uses less digits than its factorization.

87750005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229.

The product of its (nonzero) digits is 9800, while the sum is 32.

The square root of 87750005 is about 9367.4972644778. The cubic root of 87750005 is about 444.3744187013.

The spelling of 87750005 in words is "eighty-seven million, seven hundred fifty thousand, five".