197090216 has 24 divisors (see below), whose sum is σ = 371982270. Its totient is φ = 97898496.

The previous prime is 197090213. The next prime is 197090221. The reversal of 197090216 is 612090791.

It can be written as a sum of positive squares in 3 ways, for example, as 181010116 + 16080100 = 13454^2 + 4010^2 .

It is not an unprimeable number, because it can be changed into a prime (197090213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 528206 + ... + 528578.

Almost surely, 2^197090216 is an apocalyptic number.

It is an amenable number.

197090216 is a deficient number, since it is larger than the sum of its proper divisors (174892054).

197090216 is an equidigital number, since it uses as much as digits as its factorization.

197090216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893 (or 632 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 197090216 is about 14038.8822916926. The cubic root of 197090216 is about 581.9535947066.

The spelling of 197090216 in words is "one hundred ninety-seven million, ninety thousand, two hundred sixteen".