194490923 has 12 divisors (see below), whose sum is σ = 214119360. Its totient is φ = 176528880.

The previous prime is 194490911. The next prime is 194490929. The reversal of 194490923 is 329094491.

It is a de Polignac number, because none of the positive numbers 2^k-194490923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194490929) 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, 134438 + ... + 135876.

It is an arithmetic number, because the mean of its divisors is an integer number (17843280).

Almost surely, 2^194490923 is an apocalyptic number.

194490923 is a deficient number, since it is larger than the sum of its proper divisors (19628437).

194490923 is a wasteful number, since it uses less digits than its factorization.

194490923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578 (or 2567 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 194490923 is about 13946.0002509680. Note that the first 3 decimals coincide. The cubic root of 194490923 is about 579.3839306696.

The spelling of 194490923 in words is "one hundred ninety-four million, four hundred ninety thousand, nine hundred twenty-three".