197641955 has 16 divisors (see below), whose sum is σ = 272574720. Its totient is φ = 134764512.

The previous prime is 197641903. The next prime is 197641973. The reversal of 197641955 is 559146791.

It is a cyclic number.

It is not a de Polignac number, because 197641955 - 2¹² = 197637859 is a prime.

It is an unprimeable number.

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, 9509 + ... + 22038.

It is an arithmetic number, because the mean of its divisors is an integer number (17035920).

Almost surely, 2^197641955 is an apocalyptic number.

197641955 is a deficient number, since it is larger than the sum of its proper divisors (74932765).

197641955 is a wasteful number, since it uses less digits than its factorization.

197641955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31738.

The product of its digits is 340200, while the sum is 47.

The square root of 197641955 is about 14058.5189475990. The cubic root of 197641955 is about 582.4961336294.

The spelling of 197641955 in words is "one hundred ninety-seven million, six hundred forty-one thousand, nine hundred fifty-five".