193908897 has 112 divisors (see below), whose sum is σ = 372144640. Its totient is φ = 98257536.

The previous prime is 193908893. The next prime is 193908943. The reversal of 193908897 is 798809391.

It is not a de Polignac number, because 193908897 - 2² = 193908893 is a prime.

It is a zygodrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (193908893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 2454504 + ... + 2454582.

It is an arithmetic number, because the mean of its divisors is an integer number (3322720).

Almost surely, 2^193908897 is an apocalyptic number.

It is an amenable number.

193908897 is a deficient number, since it is larger than the sum of its proper divisors (178235743).

193908897 is an equidigital number, since it uses as much as digits as its factorization.

193908897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The square root of 193908897 is about 13925.1174860394. The cubic root of 193908897 is about 578.8054058947.

The spelling of 193908897 in words is "one hundred ninety-three million, nine hundred eight thousand, eight hundred ninety-seven".