197036409 has 16 divisors (see below), whose sum is σ = 279400320. Its totient is φ = 123083520.

The previous prime is 197036401. The next prime is 197036429. The reversal of 197036409 is 904630791.

It is not a de Polignac number, because 197036409 - 2³ = 197036401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197036401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3244 + ... + 20114.

It is an arithmetic number, because the mean of its divisors is an integer number (17462520).

Almost surely, 2^197036409 is an apocalyptic number.

It is an amenable number.

197036409 is a deficient number, since it is larger than the sum of its proper divisors (82363911).

197036409 is a wasteful number, since it uses less digits than its factorization.

197036409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17120.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 197036409 is about 14036.9658046175. The cubic root of 197036409 is about 581.9006307599.

The spelling of 197036409 in words is "one hundred ninety-seven million, thirty-six thousand, four hundred nine".