217089089 has 4 divisors (see below), whose sum is σ = 248101824. Its totient is φ = 186076356.

The previous prime is 217089053. The next prime is 217089091. The reversal of 217089089 is 980980712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 217089089 - 2¹² = 217084993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217089689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15506357 + ... + 15506370.

It is an arithmetic number, because the mean of its divisors is an integer number (62025456).

Almost surely, 2^217089089 is an apocalyptic number.

It is an amenable number.

217089089 is a deficient number, since it is larger than the sum of its proper divisors (31012735).

217089089 is an equidigital number, since it uses as much as digits as its factorization.

217089089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31012734.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 217089089 is about 14733.9434300529. The cubic root of 217089089 is about 601.0067256352.

The spelling of 217089089 in words is "two hundred seventeen million, eighty-nine thousand, eighty-nine".