197942149 has 2 divisors, whose sum is σ = 197942150. Its totient is φ = 197942148.

The previous prime is 197942131. The next prime is 197942167. The reversal of 197942149 is 941249791.

It is a balanced prime because it is at equal distance from previous prime (197942131) and next prime (197942167).

It can be written as a sum of positive squares in only one way, i.e., 134977924 + 62964225 = 11618^2 + 7935^2 .

It is an emirp because it is prime and its reverse (941249791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197942149 - 2¹¹ = 197940101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 197942099 and 197942108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197942449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98971074 + 98971075.

It is an arithmetic number, because the mean of its divisors is an integer number (98971075).

Almost surely, 2^197942149 is an apocalyptic number.

It is an amenable number.

197942149 is a deficient number, since it is larger than the sum of its proper divisors (1).

197942149 is an equidigital number, since it uses as much as digits as its factorization.

197942149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 46.

The square root of 197942149 is about 14069.1914835217. The cubic root of 197942149 is about 582.7908979465.

The spelling of 197942149 in words is "one hundred ninety-seven million, nine hundred forty-two thousand, one hundred forty-nine".