197423421 has 32 divisors (see below), whose sum is σ = 298986240. Its totient is φ = 114960384.

The previous prime is 197423417. The next prime is 197423423. The reversal of 197423421 is 124324791.

It is not a de Polignac number, because 197423421 - 2² = 197423417 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197423423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85875 + ... + 88143.

It is an arithmetic number, because the mean of its divisors is an integer number (9343320).

Almost surely, 2^197423421 is an apocalyptic number.

It is an amenable number.

197423421 is a deficient number, since it is larger than the sum of its proper divisors (101562819).

197423421 is a wasteful number, since it uses less digits than its factorization.

197423421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2405.

The product of its digits is 12096, while the sum is 33.

The square root of 197423421 is about 14050.7444998477. The cubic root of 197423421 is about 582.2813645268.

The spelling of 197423421 in words is "one hundred ninety-seven million, four hundred twenty-three thousand, four hundred twenty-one".