193868289 has 32 divisors (see below), whose sum is σ = 306426240. Its totient is φ = 120715776.

The previous prime is 193868263. The next prime is 193868299. The reversal of 193868289 is 982868391.

It is a happy number.

It is not a de Polignac number, because 193868289 - 2⁸ = 193868033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (193868239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61342 + ... + 64424.

It is an arithmetic number, because the mean of its divisors is an integer number (9575820).

Almost surely, 2^193868289 is an apocalyptic number.

It is an amenable number.

193868289 is a deficient number, since it is larger than the sum of its proper divisors (112557951).

193868289 is a wasteful number, since it uses less digits than its factorization.

193868289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3246 (or 3240 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 193868289 is about 13923.6593250481. The cubic root of 193868289 is about 578.7649989971.

The spelling of 193868289 in words is "one hundred ninety-three million, eight hundred sixty-eight thousand, two hundred eighty-nine".