197264421 has 6 divisors (see below), whose sum is σ = 284937510. Its totient is φ = 131509608.

The previous prime is 197264411. The next prime is 197264443. The reversal of 197264421 is 124462791.

It is a happy number.

197264421 is a `hidden beast` number, since 1 + 9 + 7 + 2 + 644 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 156125025 + 41139396 = 12495^2 + 6414^2 .

It is not a de Polignac number, because 197264421 - 2¹⁸ = 197002277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197264411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10959126 + ... + 10959143.

It is an arithmetic number, because the mean of its divisors is an integer number (47489585).

Almost surely, 2^197264421 is an apocalyptic number.

It is an amenable number.

197264421 is a deficient number, since it is larger than the sum of its proper divisors (87673089).

197264421 is a wasteful number, since it uses less digits than its factorization.

197264421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21918275 (or 21918272 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 197264421 is about 14045.0852969998. The cubic root of 197264421 is about 582.1250041479.

The spelling of 197264421 in words is "one hundred ninety-seven million, two hundred sixty-four thousand, four hundred twenty-one".