394172220827 has 8 divisors (see below), whose sum is σ = 491435496192. Its totient is φ = 307147185000.

The previous prime is 394172220823. The next prime is 394172220833. The reversal of 394172220827 is 728022271493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 394172220827 - 2² = 394172220823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394172220823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2559559799 + ... + 2559559952.

It is an arithmetic number, because the mean of its divisors is an integer number (61429437024).

Almost surely, 2^394172220827 is an apocalyptic number.

394172220827 is a deficient number, since it is larger than the sum of its proper divisors (97263275365).

394172220827 is a wasteful number, since it uses less digits than its factorization.

394172220827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5119119769.

The product of its (nonzero) digits is 677376, while the sum is 47.

The spelling of 394172220827 in words is "three hundred ninety-four billion, one hundred seventy-two million, two hundred twenty thousand, eight hundred twenty-seven".