194425811 has 4 divisors (see below), whose sum is σ = 195113112. Its totient is φ = 193738512.

The previous prime is 194425789. The next prime is 194425843. The reversal of 194425811 is 118524491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118524491 = 5171 ⋅22921.

It is a cyclic number.

It is not a de Polignac number, because 194425811 - 2²⁶ = 127316947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194425871) 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 3 ways as a sum of consecutive naturals, for example, 343226 + ... + 343791.

It is an arithmetic number, because the mean of its divisors is an integer number (48778278).

Almost surely, 2^194425811 is an apocalyptic number.

194425811 is a deficient number, since it is larger than the sum of its proper divisors (687301).

194425811 is an equidigital number, since it uses as much as digits as its factorization.

194425811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687300.

The product of its digits is 11520, while the sum is 35.

The square root of 194425811 is about 13943.6656227837. The cubic root of 194425811 is about 579.3192677425.

The spelling of 194425811 in words is "one hundred ninety-four million, four hundred twenty-five thousand, eight hundred eleven".