394605918141 has 4 divisors (see below), whose sum is σ = 526141224192. Its totient is φ = 263070612092.

The previous prime is 394605918137. The next prime is 394605918167. The reversal of 394605918141 is 141819506493.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 394605918141 - 2² = 394605918137 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394605918181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65767653021 + ... + 65767653026.

It is an arithmetic number, because the mean of its divisors is an integer number (131535306048).

Almost surely, 2^394605918141 is an apocalyptic number.

It is an amenable number.

394605918141 is a deficient number, since it is larger than the sum of its proper divisors (131535306051).

394605918141 is a wasteful number, since it uses less digits than its factorization.

394605918141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131535306050.

The product of its (nonzero) digits is 933120, while the sum is 51.

The spelling of 394605918141 in words is "three hundred ninety-four billion, six hundred five million, nine hundred eighteen thousand, one hundred forty-one".