197649383 has 2 divisors, whose sum is σ = 197649384. Its totient is φ = 197649382.

The previous prime is 197649367. The next prime is 197649421. The reversal of 197649383 is 383946791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197649383 - 2⁴ = 197649367 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197649083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98824691 + 98824692.

It is an arithmetic number, because the mean of its divisors is an integer number (98824692).

Almost surely, 2^197649383 is an apocalyptic number.

197649383 is a deficient number, since it is larger than the sum of its proper divisors (1).

197649383 is an equidigital number, since it uses as much as digits as its factorization.

197649383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 50.

The square root of 197649383 is about 14058.7831265725. The cubic root of 197649383 is about 582.5034308774.

The spelling of 197649383 in words is "one hundred ninety-seven million, six hundred forty-nine thousand, three hundred eighty-three".