197655049 has 4 divisors (see below), whose sum is σ = 197759236. Its totient is φ = 197550864.

The previous prime is 197655037. The next prime is 197655061. The reversal of 197655049 is 940556791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 940556791 = 19 ⋅49502989.

It is an interprime number because it is at equal distance from previous prime (197655037) and next prime (197655061).

It can be written as a sum of positive squares in 2 ways, for example, as 163021824 + 34633225 = 12768^2 + 5885^2 .

It is a cyclic number.

It is not a de Polignac number, because 197655049 - 2⁹ = 197654537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197658049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49194 + ... + 53059.

It is an arithmetic number, because the mean of its divisors is an integer number (49439809).

Almost surely, 2^197655049 is an apocalyptic number.

It is an amenable number.

197655049 is a deficient number, since it is larger than the sum of its proper divisors (104187).

197655049 is a wasteful number, since it uses less digits than its factorization.

197655049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104186.

The product of its (nonzero) digits is 340200, while the sum is 46.

The square root of 197655049 is about 14058.9846361677. The cubic root of 197655049 is about 582.5089970182.

The spelling of 197655049 in words is "one hundred ninety-seven million, six hundred fifty-five thousand, forty-nine".