88021609 has 8 divisors (see below), whose sum is σ = 95065992. Its totient is φ = 81016320.

The previous prime is 88021607. The next prime is 88021673. The reversal of 88021609 is 90612088.

It can be written as a sum of positive squares in 4 ways, for example, as 7075600 + 80946009 = 2660^2 + 8997^2 .

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 88021609 - 2¹ = 88021607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (88021607) 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, 5002 + ... + 14179.

It is an arithmetic number, because the mean of its divisors is an integer number (11883249).

Almost surely, 2^88021609 is an apocalyptic number.

It is an amenable number.

88021609 is a deficient number, since it is larger than the sum of its proper divisors (7044383).

88021609 is a wasteful number, since it uses less digits than its factorization.

88021609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19547.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 88021609 is about 9381.9832125196. The cubic root of 88021609 is about 444.8324226992.

The spelling of 88021609 in words is "eighty-eight million, twenty-one thousand, six hundred nine".