88521209 has 8 divisors (see below), whose sum is σ = 106491840. Its totient is φ = 71881776.

The previous prime is 88521203. The next prime is 88521211. The reversal of 88521209 is 90212588.

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 88521209 - 2⁸ = 88520953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (88521203) 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, 332654 + ... + 332919.

It is an arithmetic number, because the mean of its divisors is an integer number (13311480).

Almost surely, 2^88521209 is an apocalyptic number.

It is an amenable number.

88521209 is a deficient number, since it is larger than the sum of its proper divisors (17970631).

88521209 is a wasteful number, since it uses less digits than its factorization.

88521209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665599.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 88521209 is about 9408.5710392174. The cubic root of 88521209 is about 445.6724404172.

The spelling of 88521209 in words is "eighty-eight million, five hundred twenty-one thousand, two hundred nine".