193081689 has 12 divisors (see below), whose sum is σ = 283623600. Its totient is φ = 126539064.

The previous prime is 193081657. The next prime is 193081717. The reversal of 193081689 is 986180391.

It is not a de Polignac number, because 193081689 - 2⁵ = 193081657 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (193082689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181279 + ... + 182340.

It is an arithmetic number, because the mean of its divisors is an integer number (23635300).

Almost surely, 2^193081689 is an apocalyptic number.

It is an amenable number.

193081689 is a deficient number, since it is larger than the sum of its proper divisors (90541911).

193081689 is a wasteful number, since it uses less digits than its factorization.

193081689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363684 (or 363681 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 193081689 is about 13895.3837298579. The cubic root of 193081689 is about 577.9811787712.

The spelling of 193081689 in words is "one hundred ninety-three million, eighty-one thousand, six hundred eighty-nine".