394108132609 has 4 divisors (see below), whose sum is σ = 394111165104. Its totient is φ = 394105100116.

The previous prime is 394108132601. The next prime is 394108132667. The reversal of 394108132609 is 906231801493.

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 394108132609 - 2³ = 394108132601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394108132601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1312147 + ... + 1584280.

It is an arithmetic number, because the mean of its divisors is an integer number (98527791276).

Almost surely, 2^394108132609 is an apocalyptic number.

It is an amenable number.

394108132609 is a deficient number, since it is larger than the sum of its proper divisors (3032495).

394108132609 is a wasteful number, since it uses less digits than its factorization.

394108132609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3032494.

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 394108132609 in words is "three hundred ninety-four billion, one hundred eight million, one hundred thirty-two thousand, six hundred nine".