194444397 has 36 divisors (see below), whose sum is σ = 328126656. Its totient is φ = 110633040.

The previous prime is 194444381. The next prime is 194444473. The reversal of 194444397 is 793444491.

It is not a de Polignac number, because 194444397 - 2⁴ = 194444381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194444377) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 118698 + ... + 120324.

Almost surely, 2^194444397 is an apocalyptic number.

It is an amenable number.

194444397 is a deficient number, since it is larger than the sum of its proper divisors (133682259).

194444397 is a wasteful number, since it uses less digits than its factorization.

194444397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918 (or 1908 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 194444397 is about 13944.3320743591. The cubic root of 194444397 is about 579.3377270283.

The spelling of 194444397 in words is "one hundred ninety-four million, four hundred forty-four thousand, three hundred ninety-seven".