394947589 has 4 divisors (see below), whose sum is σ = 395120800. Its totient is φ = 394774380.

The previous prime is 394947571. The next prime is 394947599. The reversal of 394947589 is 985749493.

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 394947589 - 2⁷ = 394947461 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 (394947529) 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, 83139 + ... + 87760.

It is an arithmetic number, because the mean of its divisors is an integer number (98780200).

Almost surely, 2^394947589 is an apocalyptic number.

It is an amenable number.

394947589 is a deficient number, since it is larger than the sum of its proper divisors (173211).

394947589 is a wasteful number, since it uses less digits than its factorization.

394947589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173210.

The product of its digits is 9797760, while the sum is 58.

The square root of 394947589 is about 19873.2883288096. The cubic root of 394947589 is about 733.6909390630.

The spelling of 394947589 in words is "three hundred ninety-four million, nine hundred forty-seven thousand, five hundred eighty-nine".