87782105 has 4 divisors (see below), whose sum is σ = 105338532. Its totient is φ = 70225680.

The previous prime is 87782089. The next prime is 87782153. The reversal of 87782105 is 50128778.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54937744 + 32844361 = 7412^2 + 5731^2 .

It is not a de Polignac number, because 87782105 - 2⁴ = 87782089 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8778206 + ... + 8778215.

It is an arithmetic number, because the mean of its divisors is an integer number (26334633).

Almost surely, 2^87782105 is an apocalyptic number.

It is an amenable number.

87782105 is a deficient number, since it is larger than the sum of its proper divisors (17556427).

87782105 is a wasteful number, since it uses less digits than its factorization.

87782105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17556426.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 87782105 is about 9369.2104790105. The cubic root of 87782105 is about 444.4285979188.

The spelling of 87782105 in words is "eighty-seven million, seven hundred eighty-two thousand, one hundred five".