97221187 has 16 divisors (see below), whose sum is σ = 112779520. Its totient is φ = 82091232.

The previous prime is 97221143. The next prime is 97221191. The reversal of 97221187 is 78112279.

It is a cyclic number.

It is not a de Polignac number, because 97221187 - 2¹¹ = 97219139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97231187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158293 + ... + 158905.

It is an arithmetic number, because the mean of its divisors is an integer number (7048720).

Almost surely, 2^97221187 is an apocalyptic number.

97221187 is a deficient number, since it is larger than the sum of its proper divisors (15558333).

97221187 is a wasteful number, since it uses less digits than its factorization.

97221187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922.

The product of its digits is 14112, while the sum is 37.

The square root of 97221187 is about 9860.0804763450. The cubic root of 97221187 is about 459.8190640008.

The spelling of 97221187 in words is "ninety-seven million, two hundred twenty-one thousand, one hundred eighty-seven".