194919121 has 8 divisors (see below), whose sum is σ = 201862080. Its totient is φ = 187990992.

The previous prime is 194919097. The next prime is 194919133. The reversal of 194919121 is 121919491.

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

It is not a de Polignac number, because 194919121 - 2⁷ = 194918993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194919191) 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, 27666 + ... + 33988.

It is an arithmetic number, because the mean of its divisors is an integer number (25232760).

Almost surely, 2^194919121 is an apocalyptic number.

It is an amenable number.

194919121 is a deficient number, since it is larger than the sum of its proper divisors (6942959).

194919121 is a wasteful number, since it uses less digits than its factorization.

194919121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7415.

The product of its digits is 5832, while the sum is 37.

The square root of 194919121 is about 13961.3438106795. The cubic root of 194919121 is about 579.8088162979.

The spelling of 194919121 in words is "one hundred ninety-four million, nine hundred nineteen thousand, one hundred twenty-one".