87421609 has 8 divisors (see below), whose sum is σ = 95611680. Its totient is φ = 79272000.

The previous prime is 87421591. The next prime is 87421669. The reversal of 87421609 is 90612478.

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 87421609 - 2⁵ = 87421577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87421669) 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, 5499 + ... + 14320.

It is an arithmetic number, because the mean of its divisors is an integer number (11951460).

Almost surely, 2^87421609 is an apocalyptic number.

It is an amenable number.

87421609 is a deficient number, since it is larger than the sum of its proper divisors (8190071).

87421609 is a wasteful number, since it uses less digits than its factorization.

87421609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20231.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 87421609 is about 9349.9523528198. The cubic root of 87421609 is about 443.8193828163.

The spelling of 87421609 in words is "eighty-seven million, four hundred twenty-one thousand, six hundred nine".