391339327 has 4 divisors (see below), whose sum is σ = 393388416. Its totient is φ = 389290240.

The previous prime is 391339309. The next prime is 391339331. The reversal of 391339327 is 723933193.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-391339327 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 391339327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391339307) 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, 1024258 + ... + 1024639.

It is an arithmetic number, because the mean of its divisors is an integer number (98347104).

Almost surely, 2^391339327 is an apocalyptic number.

391339327 is a deficient number, since it is larger than the sum of its proper divisors (2049089).

391339327 is a wasteful number, since it uses less digits than its factorization.

391339327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2049088.

The product of its digits is 91854, while the sum is 40.

The square root of 391339327 is about 19782.2983245122. The cubic root of 391339327 is about 731.4497535766.

The spelling of 391339327 in words is "three hundred ninety-one million, three hundred thirty-nine thousand, three hundred twenty-seven".