87810609 has 16 divisors (see below), whose sum is σ = 124140800. Its totient is φ = 55055376.

The previous prime is 87810607. The next prime is 87810623. The reversal of 87810609 is 90601878.

It is not a de Polignac number, because 87810609 - 2¹ = 87810607 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87810607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2382 + ... + 13464.

It is an arithmetic number, because the mean of its divisors is an integer number (7758800).

Almost surely, 2^87810609 is an apocalyptic number.

It is an amenable number.

87810609 is a deficient number, since it is larger than the sum of its proper divisors (36330191).

87810609 is a wasteful number, since it uses less digits than its factorization.

87810609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11244.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 87810609 is about 9370.7315082655. The cubic root of 87810609 is about 444.4766966433.

The spelling of 87810609 in words is "eighty-seven million, eight hundred ten thousand, six hundred nine".