197148257 has 4 divisors (see below), whose sum is σ = 197560320. Its totient is φ = 196736196.

The previous prime is 197148229. The next prime is 197148317. The reversal of 197148257 is 752841791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 197148257 - 2⁸ = 197148001 is a prime.

It is a super-3 number, since 3×197148257³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197148557) 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 3 ways as a sum of consecutive naturals, for example, 205313 + ... + 206270.

It is an arithmetic number, because the mean of its divisors is an integer number (49390080).

Almost surely, 2^197148257 is an apocalyptic number.

It is an amenable number.

197148257 is a deficient number, since it is larger than the sum of its proper divisors (412063).

197148257 is an equidigital number, since it uses as much as digits as its factorization.

197148257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412062.

The product of its digits is 141120, while the sum is 44.

The square root of 197148257 is about 14040.9492912694. The cubic root of 197148257 is about 582.0107155083.

The spelling of 197148257 in words is "one hundred ninety-seven million, one hundred forty-eight thousand, two hundred fifty-seven".