87834385 has 8 divisors (see below), whose sum is σ = 105506280. Its totient is φ = 70197504.

The previous prime is 87834379. The next prime is 87834389. The reversal of 87834385 is 58343878.

It is a Cunningham number, because it is equal to 9372²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 31629376 + 56205009 = 5624^2 + 7497^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 87834385 - 2⁵ = 87834353 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (87834389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2872 + ... + 13561.

It is an arithmetic number, because the mean of its divisors is an integer number (13188285).

Almost surely, 2^87834385 is an apocalyptic number.

It is an amenable number.

87834385 is a deficient number, since it is larger than the sum of its proper divisors (17671895).

87834385 is a wasteful number, since it uses less digits than its factorization.

87834385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17507.

The product of its digits is 645120, while the sum is 46.

The square root of 87834385 is about 9372.0000533504. Note that the first 4 decimals coincide. The cubic root of 87834385 is about 444.5168092007.

The spelling of 87834385 in words is "eighty-seven million, eight hundred thirty-four thousand, three hundred eighty-five".