197730149 has 12 divisors (see below), whose sum is σ = 213845100. Its totient is φ = 182597184.

The previous prime is 197730139. The next prime is 197730157. The reversal of 197730149 is 941037791.

It can be written as a sum of positive squares in 2 ways, for example, as 116856100 + 80874049 = 10810^2 + 8993^2 .

It is not a de Polignac number, because 197730149 - 2⁴ = 197730133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197730139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8897 + ... + 21785.

It is an arithmetic number, because the mean of its divisors is an integer number (17820425).

Almost surely, 2^197730149 is an apocalyptic number.

It is an amenable number.

197730149 is a deficient number, since it is larger than the sum of its proper divisors (16114951).

197730149 is a wasteful number, since it uses less digits than its factorization.

197730149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12964 (or 12941 counting only the distinct ones).

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 197730149 is about 14061.6552724066. The cubic root of 197730149 is about 582.5827633880.

The spelling of 197730149 in words is "one hundred ninety-seven million, seven hundred thirty thousand, one hundred forty-nine".