193920121 has 8 divisors (see below), whose sum is σ = 197041824. Its totient is φ = 190817280.

The previous prime is 193920113. The next prime is 193920143. The reversal of 193920121 is 121029391.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 193920121 - 2³ = 193920113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 193920121.

It is not an unprimeable number, because it can be changed into a prime (193920421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16786 + ... + 25876.

It is an arithmetic number, because the mean of its divisors is an integer number (24630228).

Almost surely, 2^193920121 is an apocalyptic number.

It is an amenable number.

193920121 is a deficient number, since it is larger than the sum of its proper divisors (3121703).

193920121 is an equidigital number, since it uses as much as digits as its factorization.

193920121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9431.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 193920121 is about 13925.5204929654. The cubic root of 193920121 is about 578.8165733151.

The spelling of 193920121 in words is "one hundred ninety-three million, nine hundred twenty thousand, one hundred twenty-one".