197153409 has 8 divisors (see below), whose sum is σ = 268984672. Its totient is φ = 128378880.

The previous prime is 197153389. The next prime is 197153413. The reversal of 197153409 is 904351791.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 197153409 - 2⁵ = 197153377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197153009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764032 + ... + 764289.

It is an arithmetic number, because the mean of its divisors is an integer number (33623084).

Almost surely, 2^197153409 is an apocalyptic number.

It is an amenable number.

197153409 is a deficient number, since it is larger than the sum of its proper divisors (71831263).

197153409 is a wasteful number, since it uses less digits than its factorization.

197153409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528367.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 197153409 is about 14041.1327534498. The cubic root of 197153409 is about 582.0157852853.

The spelling of 197153409 in words is "one hundred ninety-seven million, one hundred fifty-three thousand, four hundred nine".