87830505 has 24 divisors (see below), whose sum is σ = 173988672. Its totient is φ = 40150944.

The previous prime is 87830503. The next prime is 87830507. The reversal of 87830505 is 50503878.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87830503) and next prime (87830507).

It is not a de Polignac number, because 87830505 - 2¹ = 87830503 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 87830505.

It is not an unprimeable number, because it can be changed into a prime (87830503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139099 + ... + 139728.

It is an arithmetic number, because the mean of its divisors is an integer number (7249528).

Almost surely, 2^87830505 is an apocalyptic number.

It is an amenable number.

87830505 is a deficient number, since it is larger than the sum of its proper divisors (86158167).

87830505 is a wasteful number, since it uses less digits than its factorization.

87830505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278845 (or 278842 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 87830505 is about 9371.7930514923. The cubic root of 87830505 is about 444.5102637359.

The spelling of 87830505 in words is "eighty-seven million, eight hundred thirty thousand, five hundred five".