971227209 has 8 divisors (see below), whose sum is σ = 1295186560. Its totient is φ = 647376336.

The previous prime is 971227207. The next prime is 971227249. The reversal of 971227209 is 902722179.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 971227209 - 2¹ = 971227207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (971227207) 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, 3217 + ... + 44190.

It is an arithmetic number, because the mean of its divisors is an integer number (161898320).

Almost surely, 2^971227209 is an apocalyptic number.

It is an amenable number.

971227209 is a deficient number, since it is larger than the sum of its proper divisors (323959351).

971227209 is a wasteful number, since it uses less digits than its factorization.

971227209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54239.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 971227209 is about 31164.5184304202. The cubic root of 971227209 is about 990.3155845239.

The spelling of 971227209 in words is "nine hundred seventy-one million, two hundred twenty-seven thousand, two hundred nine".