194942397 has 16 divisors (see below), whose sum is σ = 284509568. Its totient is φ = 117996480.

The previous prime is 194942393. The next prime is 194942399. The reversal of 194942397 is 793249491.

It is a happy number.

It is not a de Polignac number, because 194942397 - 2² = 194942393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194942393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38593 + ... + 43350.

It is an arithmetic number, because the mean of its divisors is an integer number (17781848).

Almost surely, 2^194942397 is an apocalyptic number.

It is an amenable number.

194942397 is a deficient number, since it is larger than the sum of its proper divisors (89567171).

194942397 is a wasteful number, since it uses less digits than its factorization.

194942397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82020.

The product of its digits is 489888, while the sum is 48.

The square root of 194942397 is about 13962.1773731750. The cubic root of 194942397 is about 579.8318944047.

The spelling of 194942397 in words is "one hundred ninety-four million, nine hundred forty-two thousand, three hundred ninety-seven".