394542109 has 8 divisors (see below), whose sum is σ = 425600000. Its totient is φ = 363585456.

The previous prime is 394542107. The next prime is 394542133. The reversal of 394542109 is 901245493.

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

It is not a de Polignac number, because 394542109 - 2¹ = 394542107 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 (394542107) 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, 17109 + ... + 32890.

It is an arithmetic number, because the mean of its divisors is an integer number (53200000).

Almost surely, 2^394542109 is an apocalyptic number.

It is an amenable number.

394542109 is a deficient number, since it is larger than the sum of its proper divisors (31057891).

394542109 is a wasteful number, since it uses less digits than its factorization.

394542109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50619.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 394542109 is about 19863.0840757421. The cubic root of 394542109 is about 733.4397674488.

The spelling of 394542109 in words is "three hundred ninety-four million, five hundred forty-two thousand, one hundred nine".