391384094 has 4 divisors (see below), whose sum is σ = 587076144. Its totient is φ = 195692046.

The previous prime is 391384079. The next prime is 391384099. The reversal of 391384094 is 490483193.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391384099) 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 as a sum of consecutive naturals, namely, 97846022 + ... + 97846025.

It is an arithmetic number, because the mean of its divisors is an integer number (146769036).

Almost surely, 2^391384094 is an apocalyptic number.

391384094 is a deficient number, since it is larger than the sum of its proper divisors (195692050).

391384094 is a wasteful number, since it uses less digits than its factorization.

391384094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195692049.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 391384094 is about 19783.4297835335. The cubic root of 391384094 is about 731.4776437478.

Subtracting 391384094 from its reverse (490483193), we obtain a palindrome (99099099).

The spelling of 391384094 in words is "three hundred ninety-one million, three hundred eighty-four thousand, ninety-four".