197484409 has 2 divisors, whose sum is σ = 197484410. Its totient is φ = 197484408.

The previous prime is 197484407. The next prime is 197484431. The reversal of 197484409 is 904484791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190578025 + 6906384 = 13805^2 + 2628^2 .

It is a cyclic number.

It is not a de Polignac number, because 197484409 - 2¹ = 197484407 is a prime.

Together with 197484407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (197484401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98742204 + 98742205.

It is an arithmetic number, because the mean of its divisors is an integer number (98742205).

Almost surely, 2^197484409 is an apocalyptic number.

It is an amenable number.

197484409 is a deficient number, since it is larger than the sum of its proper divisors (1).

197484409 is an equidigital number, since it uses as much as digits as its factorization.

197484409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 197484409 is about 14052.9146087209. The cubic root of 197484409 is about 582.3413177642.

The spelling of 197484409 in words is "one hundred ninety-seven million, four hundred eighty-four thousand, four hundred nine".