197657973 has 24 divisors (see below), whose sum is σ = 291529056. Its totient is φ = 129016800.

The previous prime is 197657951. The next prime is 197657981. The reversal of 197657973 is 379756791.

It is not a de Polignac number, because 197657973 - 2⁸ = 197657717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (192657973) 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 23 ways as a sum of consecutive naturals, for example, 108238 + ... + 110048.

It is an arithmetic number, because the mean of its divisors is an integer number (12147044).

Almost surely, 2^197657973 is an apocalyptic number.

It is an amenable number.

197657973 is a deficient number, since it is larger than the sum of its proper divisors (93871083).

197657973 is a wasteful number, since it uses less digits than its factorization.

197657973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065 (or 2062 counting only the distinct ones).

The product of its digits is 2500470, while the sum is 54.

The square root of 197657973 is about 14059.0886262233. The cubic root of 197657973 is about 582.5118694432.

The spelling of 197657973 in words is "one hundred ninety-seven million, six hundred fifty-seven thousand, nine hundred seventy-three".