193489643 has 2 divisors, whose sum is σ = 193489644. Its totient is φ = 193489642.

The previous prime is 193489609. The next prime is 193489669. The reversal of 193489643 is 346984391.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 193489643 - 2¹² = 193485547 is a prime.

It is not a weakly prime, because it can be changed into another prime (193489343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96744821 + 96744822.

It is an arithmetic number, because the mean of its divisors is an integer number (96744822).

Almost surely, 2^193489643 is an apocalyptic number.

193489643 is a deficient number, since it is larger than the sum of its proper divisors (1).

193489643 is an equidigital number, since it uses as much as digits as its factorization.

193489643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 47.

The square root of 193489643 is about 13910.0554635846. The cubic root of 193489643 is about 578.3879562796.

The spelling of 193489643 in words is "one hundred ninety-three million, four hundred eighty-nine thousand, six hundred forty-three".