194143445 has 4 divisors (see below), whose sum is σ = 232972140. Its totient is φ = 155314752.

The previous prime is 194143393. The next prime is 194143457. The reversal of 194143445 is 544341491.

194143445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544341491 = 61 ⋅8923631.

It can be written as a sum of positive squares in 2 ways, for example, as 108451396 + 85692049 = 10414^2 + 9257^2 .

It is a cyclic number.

It is not a de Polignac number, because 194143445 - 2⁶ = 194143381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19414340 + ... + 19414349.

It is an arithmetic number, because the mean of its divisors is an integer number (58243035).

Almost surely, 2^194143445 is an apocalyptic number.

It is an amenable number.

194143445 is a deficient number, since it is larger than the sum of its proper divisors (38828695).

194143445 is an equidigital number, since it uses as much as digits as its factorization.

194143445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38828694.

The product of its digits is 34560, while the sum is 35.

The square root of 194143445 is about 13933.5367010677. The cubic root of 194143445 is about 579.0386820236.

The spelling of 194143445 in words is "one hundred ninety-four million, one hundred forty-three thousand, four hundred forty-five".