197153907 has 8 divisors (see below), whose sum is σ = 274301184. Its totient is φ = 125721288.

The previous prime is 197153903. The next prime is 197153921. The reversal of 197153907 is 709351791.

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

It is not a de Polignac number, because 197153907 - 2² = 197153903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197153903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1428583 + ... + 1428720.

It is an arithmetic number, because the mean of its divisors is an integer number (34287648).

Almost surely, 2^197153907 is an apocalyptic number.

197153907 is a deficient number, since it is larger than the sum of its proper divisors (77147277).

197153907 is a wasteful number, since it uses less digits than its factorization.

197153907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857329.

The product of its (nonzero) digits is 59535, while the sum is 42.

The square root of 197153907 is about 14041.1504870506. The cubic root of 197153907 is about 582.0162753328.

The spelling of 197153907 in words is "one hundred ninety-seven million, one hundred fifty-three thousand, nine hundred seven".