4047391 has 8 divisors (see below), whose sum is σ = 4212864. Its totient is φ = 3884160.

The previous prime is 4047383. The next prime is 4047409. The reversal of 4047391 is 1937404.

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

It is a cyclic number.

It is not a de Polignac number, because 4047391 - 2³ = 4047383 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 (4047301) 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 7 ways as a sum of consecutive naturals, for example, 3771 + ... + 4723.

It is an arithmetic number, because the mean of its divisors is an integer number (526608).

Almost surely, 2^4047391 is an apocalyptic number.

4047391 is a deficient number, since it is larger than the sum of its proper divisors (165473).

4047391 is a wasteful number, since it uses less digits than its factorization.

4047391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 4047391 is about 2011.8128640607. The cubic root of 4047391 is about 159.3645499236.

The spelling of 4047391 in words is "four million, forty-seven thousand, three hundred ninety-one".