394436099 has 4 divisors (see below), whose sum is σ = 394476264. Its totient is φ = 394395936.

The previous prime is 394436093. The next prime is 394436101. The reversal of 394436099 is 990634493.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 990634493 = 1861 ⋅532313.

It is a cyclic number.

It is not a de Polignac number, because 394436099 - 2¹⁶ = 394370563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394436093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5579 + ... + 28635.

It is an arithmetic number, because the mean of its divisors is an integer number (98619066).

Almost surely, 2^394436099 is an apocalyptic number.

394436099 is a deficient number, since it is larger than the sum of its proper divisors (40165).

394436099 is a wasteful number, since it uses less digits than its factorization.

394436099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40164.

The product of its (nonzero) digits is 629856, while the sum is 47.

The square root of 394436099 is about 19860.4153783349. The cubic root of 394436099 is about 733.3740719563.

The spelling of 394436099 in words is "three hundred ninety-four million, four hundred thirty-six thousand, ninety-nine".