194423931 has 24 divisors (see below), whose sum is σ = 306096336. Its totient is φ = 118198080.

The previous prime is 194423923. The next prime is 194423947. The reversal of 194423931 is 139324491.

It is not a de Polignac number, because 194423931 - 2³ = 194423923 is a prime.

It is a super-2 number, since 2×194423931² = 75601329890985522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (194423431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 300 + ... + 19721.

It is an arithmetic number, because the mean of its divisors is an integer number (12754014).

Almost surely, 2^194423931 is an apocalyptic number.

194423931 is a deficient number, since it is larger than the sum of its proper divisors (111672405).

194423931 is a wasteful number, since it uses less digits than its factorization.

194423931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20123 (or 20120 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 194423931 is about 13943.5982084970. The cubic root of 194423931 is about 579.3174004943.

The spelling of 194423931 in words is "one hundred ninety-four million, four hundred twenty-three thousand, nine hundred thirty-one".